It was bedtime yet again for the little pink kitten. Koniko yawned and groomed the back of her wrist as she drowsily sauntered into the bathroom. As she got older it felt like the days went by faster. Wake up, breakfast, endless hours of school, endless hours of homework, dinner, then bathtime followed shortly by bedtime. She barely got any time to play with her big brother! Being a big cub is such hard work, she had no idea how Niko handled it for so long. Hopefully one day she’ll be just as big and strong as he is.
	Using her step stool in the bathroom, she stood over the sink and brushed her teeth, making sure to do it after drinking her nightly warm milk. Once she had spat out her bubble gum flavored toothpaste (which Mommy annoyingly warned her not to eat for some reason), she was ready for bed! Gone were the days her parents had to nag and fight her to go to sleep, she’s such a big girl she already put on her favorite blue onesie! In fact, she was such a big girl that she didn’t mind all the faded stains around the crotch from recent bed wettings…those happen to big girls too right? Niko told her she was still a big girl after every nighttime accident as long as she was brave about it, so it must be true! Speaking of Niko, she still hasn’t given him his good night hug!
	She sprinted to his door, as she did nearly every night, and burst right into his room without knocking—as she did every night. “Nikoooooo!”
	And as every night, Nikoli flinched at her grand entrance. This time he had just pulled his pajama bottoms up over the red fabric of his briefs. He finally graduated to big cub undies, something Koniko also hoped to mirror permanently. He turned around just in time for his sister to latch on to him. “H-huh?”
	“Goodnight Niko!”
	“Y-you always hug too tight!” He pulled his limbs out of his giggling sister’s grip and wrapped his arms around her for a proper hug. “Goodnight Koni…” The bigger kitten drew out his words, leaning his head down and taking a long inhale. “You smell good…” He mumbled, brushing his cheek against hers. The hidden scent of aged feline urine burned in his nostrils.
	Koniko could hear the subtle sensual smile in his voice, and could feel it through the beginnings of a purr in his chest. “Really?!” She bounced, happy to make her brother happy.
	“Yeah…” Nikoli took another deep breath before letting off with a pleasant sigh. “We should go to bed before Mom and Dad get mad.”
	“Awww.” True, big girls always go to bed on time. 
“...You can stop crushing me now.”
	“Ok…goodnight again!” On that note, Koniko finally let go and dashed off to her room. She promptly slipped into bed, treasuring those initial moments where the covers still felt nice and cool on her wiggling toes. Her nightlight was plugged in, her toys were put away, and under her jammies she was wearing her new specially padded ‘just in case’ panties (those the ‘case’ happened more often than she’d like to admit). Soon after Mommy came in to tuck her in and give her a goodnight kiss, providing an official end to yet another perfect day. 
*    *    *
	“Oooooh…mmfh.” Several hours into the night when all good little kitties should be fast asleep, Koniko stirred restlessly under the sheets. “A-ah, mrow…” She bit her lip, her face scrunching as her thighs grinded together. Her body curled around an intense pressure building behind her most sensitive parts, like the most tingly, numbing, blaring, pulsing, itch that her subconscious couldn’t reach, but screamed to relieve.
An unwritten but equally prominent part of her nighttime routine was unfortunately a step she always seemed to forget: using the potty before bed. Even as she grew closer to big cubhood, that ever important, mattress saving task so often slipped her tired little head. And as every night, she was tottering precariously on the edge of bursting right through her padded panties.
“Mmmrrrr…nyaa…” She groaned, uncurling from her left side just to squirm and curl up on her right. Her eyebrows scrunched and her navel quivered above her taunt bladder. There was a rising pang in her crotch as all the water, and juice, and soda, and lots and lots of milk plotted for another escape. “Hah…hah…hah…” She panted, the pressure was rising fast. Her whole body tensed and seized, trying to get away from that angry feeling. Deep inside her bothered, pulsing privates, there was a nervous twitch. The passive tightness of her bladder was already tough enough, but now the feeling was growing unbearable. 
She grit her teeth, her knees drew inward, desperately trying to satiate the panging in her loins, but it was unstoppable. The intense numbness in her crotch transitioned into a sharp electric stabbing tingle, and kept rising and rising and rising. Her vulva throbbed, her back arched off the bed, she couldn’t take it! 
“Rrrraaaaaaa…” In a flash, like a quick pinch, that sharp crescendo came crashing down, and all the tightness was suddenly replaced with the most heavenly soothing wave of warmth around her crotch, in tandem with a hiss underneath the covers. “Aaaaah…” Koniko’s cry transitioned into a moan just before her green eyes blinked open. As her senses came back to her, her body instinctively tensed and that beautiful sensation abruptly reverted back to sharp twinges. “Oooooh…” She groaned, her thighs pressing back together with an extra squish around her crotch. She sat up with a scrunched pout, shoving her paws into her lap and bouncing in place while the meanie pangs settled.
It wasn’t a surprise anymore, it happened too many nights. She had to go potty again, really bad. Bad enough to wake her up, again, which in itself was a blessing and a curse. If she’s lucky—and she really hoped she was—she might’ve just avoided a real accident. “A-ah, m-mrow…” Koniko stiffened and shuddered, finally sitting still as those pangs transitioned to a passive tightness. She sighed, it was still an awfully mean feeling from her bladder, but at least now she could breathe. But first…
She felt around her crotch, the warm, moist padding of her underwear pressed right against her still dripping lips, sending a shiver through her tail. But, the crotch of her onesie was still dry to the touch. Happy giggles started rising in her tummy, she didn’t wet the bed again! Though, she wondered just how wet she was herself…
She sat criss-crossed on her bed, and unzipped her onesie down to her belly button. She slipped in a curious paw and rubbed along her thigh. It was dry, but the sensitive touch left her shuddering as her bladder sizzled. Her paw continued over to her panties where it was a much different story. The padded crotch had indeed done its job, feeling absolutely hot and swollen with fresh feline pee. She gave it a firm press with a finger and gasped, a few steamy droplets unlogged and ran down the sides of her labia until they absorbed into her rump fur. Ooh, it gave her such an exciting ticklish feeling, gosh she bet it’d feel so good to squish but…she probably shouldn’t risk anymore pee leaking. Speaking of pee, she really should go potty too…
“Mmmmfh…” Koniko slowly stepped off her bed, paws on her crotch as she arched her back for a leak-free stretch. Ugh, she returned to a slight knee-shivering hunch. Her overfilled bladder was so tight and heavy, but she was so grateful most of it stayed where it belonged. She smiled to herself skittering over to the door, maybe this was the start of a dry streak! Never wetting the bed again would be so worth the mean midnight wake ups! And, maybe soon enough she’ll never even need padded panties again! She’d go back to wearing her regular big girl panties with pretty designs that feel so comfy…oh.
Koniko opened the door and found a jet-black abyss beyond her room. Instantly the weight in her bladder felt twice as heavy, and all the optimism from moments ago was nowhere to be found. There could be anything down there, l-like a monster! Or a ghost! Or a kitten eating ghost-monster! Mmmmfh, her feet grew antsy. She closed the door so at least no creatures could see her potty-dance. Her throat tightened as a frustrated whine escaped her lips, this is so unfair! She’ll never make it to the potty, some evil meanie’ll gobble her and her soaked pajamas right up. After she did such a good job waking up dry too…but wait. Niko’s room is down the hall from hers! Mmph, the boost of excitement made her twist. M-maybe he could s-save her, ah, b-but what if he’s annoyed she wakes him up, augh, but he did say she could always ask for help, but, nngn, s-she still has to walk through all the scary dark to get there, oooh…
One paw went to her crotch, while the other stuck an anxious finger in her mouth.She wanted the potty, she wanted her big brother, and she wanted to make her brother proud. He’d probably be so happy that she’s being brave, and that she didn’t wet her bed, and that she made it to the potty, he’d probably want to give her a hug! And a kiss! A-and touch her panties and see how she almost had an accident but didn’t! And, and, f-feel around her special spots again and make her feel really good mmmfh, but this time maybe even— “Aaah!” 
A harsh bladder twinge snapped Koniko out of her thoughts. Her insides reacted before the rest of her could, sending a high-pressured squirt shooting out into her panties to relieve it. Half a second later she flinched, clamping down on a now oversaturated layer of padding between her thighs. She gasped, shivering as a thin layer of excess kitty juice swished around her vulva before soaking into her thigh fur. Luckily, it seemed to avoid the fabric of her onesie.
Whew, h-hah, it tickled her parts so much! And combined with the heavy pressure weighing on her crotch, it nearly made her knees buckle. She bit her lip, and squirmed her hips as she those feelings coursed through her. She wished Niko was here to help, to see her so bravely battling those meanie pangs, to feel her soaking loins. Mmfh, she needs to get to his room before she explodes. 
“Mmmmmah…” Koniko whined, squirming back to the door and grabbing the knob with a shivering paw. She’s gonna make it to the potty, she’s gonna keep her jammies dry…with a twist and a pull, the door slowly creaked open, and she faced the all-encompassing darkness once again. “Hooh.” She huffed, the weight of her bladder felt like it doubled—no, tripled. But she braved on, gritting her teeth, squeezing her crotch harder, and took one shaky step over the threshold…and then another…and another…s-she’s fine. Shaking like a leaf and on verge of bursting, but she’s alive and uneaten.
She gulped and found the courage to look up. Squinting through the darkness, she saw that she was alone, for now, and Niko’s door was only halfway down the hall. That’s like…a thousand feet! She’d never make that! …Unless she runs. Koniko took a deep breath, gripped herself tight, and bravely launched into a sprint! It only lasted about 3 seconds, but those were the scariest 3 seconds of her life. 
“Ooooh…” And it was absolutely terrifying for her bladder too, which got a good thrashing from the run. She nearly collapsed at his door as endless sharp pangs attacked her privates. Tears in her eyes, she had to bite her tongue to keep from sobbing as she opened the door. And there her brother was, fast asleep under his favorite blue starred blanket, his figure indirectly illuminated by his nightlight. Mmmfh, o-oh gosh, she could barely walk. She took slow twisting, grinding steps up to his bed. S-she’s gonna be Ok, Niko’s right there, and they can run to the potty together, a-and he’s gonna be so happy his sister made it like a big girl, and, and, it’s gonna feel, sooooooo good when she f-finally gets to go, and when he feels her wet panties, mmmfh, she can already feel it rising in her—“H-hoh!” 
She gasped, an eager bladder contraction snapping through her like a whip. Her knees faltered mid-step, a quick twisting turn had her rump plopping down on the end of his bed with a heavy jostle. She bounced in place, paws crammed between her thighs as whimpers escaped her. Furious tingles ravaged her crotch, eating away at another ounce of her control each second. Tears started to flow down her cheeks. Please, please, don’t let her have an accident here! Not on Niko’s bed! She’d pee her pants standing in front of class or soak her shorts during a long road trip if it meant she could save herself in this moment! She sniffled feeling those sensations grow numb, N-Niko’s gonna be so, hic, m-mad…
“Koni?” The kitten in question froze stiff. Oh no…she meant to wake him, but not like this! She heard the covers rustle and felt the bed gently rock as he shifted. There was the click of a lamp and their corner of the room was filled with a gentle orange hue. “What’s wrong?”
“U-um…” Koniko felt those tingles calm to a more manageable, yet still unpleasant tightness. It, along with the presence of her brother kept her shoulders tense, and her teary eyes straight ahead at the wall.
“Do you have to go potty?”
Koniko felt herself blush under her fur. Niko’s seen her do far more embarrassing things, including outright accidents, yet this vulnerable stage still felt so babyish. “Y-yeah.” She mumbled, looking down. 
The bed shifted again and Niko’s feet came into view as he sat next to her. She looked up, finding his eyes looking at her sideways with concern. “What’s wrong? Why didn’t you go?” He asked, raising a paw to gently wipe a tear from her face.
“Because,” She gulped, some light twinges had her starting to bounce again. “I-it’s really dark…”
Niko’s eyes dipped downward, hesitating on the tight grip she held on her crotch. “You really have to go…” He mumbled, a blush starting to rise under his fur as well.
“Y-yeah…” Koniko paused to sniff, she felt more tears welling up with embarrassment. “I-I almost had an accident when I woke up too.”
“Really?” Nikoli edged down closer to her crotch as if it had its own gravitational pull. “What happened?” Koniko looked away while her thighs squeezed tighter around the paws in her lap. She felt her throat tighten when the wet padding squished against her privates. “Koni?” Her brother scooched closer and wrapped an arm around her middle. Koniko gasped, every muscle in her body suddenly clenching. His arms happened to squeeze around her bladder, filling her with an indescribable blaring pressure that had her frozen stiff. “It’s Ok Koni,” Niko’s eyes flickered while his paw kept shifting on her side, as if scanning her body for reactions. “You can tell me…I won’t make fun of you.”
“I…” Koniko swallowed, her knees starting to fidget as she found her bravery again. “I-I woke up with this really tingly feeling around my pee-pee, and then it really hurt because all the pee wanted to come out but I didn’t let it, and, and, w-when I went to check my panties…” 
Nikoli’s ears perked, his eyes wide waiting for the conclusion. “D-did you wet them?” He asked, his voice getting just as raspy as his sister’s.
“A-a little bit…” She croaked, rocking slightly as her legs started grinding. “B-but I kept my bed dry!” Koniko’s face lit up with that announcement. Despite how much her underwear squished in her grip, she felt pride in that tonight, she did not wet the bed!
Nikoli blinked, catching note of his sister’s mood switch. “Oh…” He snaked his paw from around her side and down along her thighs, making his sister shiver. He continued, his finger making a circle around her inner thighs, before hesitating at the tight convergence of her limbs. 
Koniko took that as a que. She inhaled and found the bravery to slowly unfurl her legs and spread them open, keeping a tight hold on her groin. Niko’s paw continued its exploration, feeling around her inner thighs, rubbing the parts of her rump he could reach from the front, before nudging his way in between the paws that held herself. “Mmmfh…” Koniko whimpered as she lifted her own paws, flinching and huffing as Nikoli rubbed right above her most sensitive parts. The warm, murmuring tingles in her vagina had her bladder on the edge of releasing. There was a heavy, needy twitch in her privates, and the squish of that wet, drippy fabric didn’t help. But, she held on. Muscles tensed, her breath shuddering, she kept herself tight and clenched to prove to her brother that she was a big girl. “A-ah.” She was gonna make him proud.
“You kept your pants dry too.” Nikoli observed with a smile, finally removing his paw. Koniko let out a shaky exhale as the sensations in loins started to calm, though she immediately missed his touch. She didn’t get to miss it for too long, however, before Niko hugged her shoulders and kissed her forehead. Even for just that second, she felt that throb flash through her body once more and had to shove her paws back to her crotch. “You really are a big girl.” He said, nuzzling her cheek.
Koniko went back to her urgent bouncing, but all of her teary plight was now replaced with delighted giggles. The tickle of his breath on her cheek was far sweeter than the panging in her crotch was bitter. “U-uh-huh!” She nodded, her voice jittery from her movements. “I held in most of it even though my pee-pee wanted to let it all out in my panties really bad!” She was ready to talk about the night’s accomplishments for hours if it got her more kisses and rubs from Niko.
“Good job.” There was something in the bigger kitten’s voice and smile when he said that. Something that felt deep and savory in her ears, she couldn’t tell what it was but it only made her more giggly. “Did you come in because you wanted me to take you to the potty?”
“Yeah…because it’s really dark.” Koniko answered, some of that excitement dimming. It felt strange to be a ‘big girl’ who’s still afraid of the dark. 
Niko gave her some reassuring head pats. “It’s Ok. Like I said last time, you can always wake me up if you have to go potty. Big girls ask for help too.”
“Hehehe, Ok!” Koniko purred and cooed, her bladder issues were starting to seem far away.
“It’s better than waiting too long and going potty in your pajamas again.” Niko couldn’t hide a smirk as he rubbed her thigh. “Even if it was really close this time.”
“Ooooh…” Koniko seized, lifting her feet off the floor as her body squeezed inward. Thinking about ‘going potty’only filled her with more trembly, twitchy feelings between her thighs.
“What?” Nikoli chuckled, returning his arm around her side to gently prod at her taunt bladder. “I’m just saying it’s good it’s you good you didn’t let out aaaaaaaaaall that pee into your panties…even though it really wants to come out.”
“Noooo d-don’t…” The bouncing started again. All that heavy, tight, hot pee inside of her wanted out so bad…
“Don’t what?” Niko squeezed her tighter against his side, grinding ever-so-slightly against all her urgent movements. “Say how good it’d feel if you started peeing right now? It’d be like a big, yellow, waterfall…” He leaned the last word into her ear with a dreamy whisper.
“Aaah!” Koniko whined, feeling his voice travel down her spine until it vibrated her bladder. “You’re so meeeeeeeean!” Though she couldn’t stop a grin from playing at the sides of her mouth.
“It’s gonna be all loud and swishy coming out like swishhhhhh and sssssshhhhhhhh.”
“Nikooooooooo!” She bumped him with her shoulder, her paws were too busy between her crossed legs. 
“Owwwww…” Nikoli cried out in faux hurt. He held onto her as he dramatically tipped backwards, sending them both flopping back on the bed.
“Eee!” The impact sent a jolt through Koniko’s bladder. “Mmmmeeeh…” She tucked her knees towards her chest as she squirmed the new pangs away. Despite how intense all those feelings were, she was as happy as could be, tittering away her favorite person in the world. She’d hold it in forever if it meant staying this moment.
After a few agonizing, amusing seconds, those sharp tingles started to fade and she slowly let her legs lay flat. Whew, she shivered, the weight of her bladder felt like it was pushing into the bed, there must be so much! A prideful grin spread across her face, she was such a big girl to hold it all in. Especially through her brother’s teasing. “You almost made me have an accident, Niko…” She mumbled, staring up at the ceiling with a giddy smile.
“Really?”
Koniko could barely hold back a chuckle.“Yeah, I almost made a big, yellow, waterfall in my panties!”
“...Did you leak a little?”
“Um…noooo…” Her answer sounded more like a droning question. The excitement from moments ago left her crotch feeling numb and warm, she genuinely couldn’t tell if the squish between her thighs had gotten anymore humid or not. “Niko?”
Her brother had sat up and leaned over her. His matching green eyes scanned her body, filled with curious desire. Koniko watched with a similar inquisitive look as he tugged down the zipper to her onesie. “Can I feel your panties?” Nikoli asked, already slipping his paw inside.
“Mrew…” Koniko shuddered at the feeling of his paw rubbing down her chest fur. She pressed her thighs together feeling her bladder start to spike.“O-Ok.” She took a deep breath as Niko’s paw traveled further down, chuffing as it passed over her ticklish tummy, wincing as it glided over her bursting bladder, before finally gasping as it reached her crotch. 
“Woah.” Nikoli mirrored her gasp with wide eyes. “It’s already so wet…” 
“Y-yeah, hooh!” Koniko’s back arched and legs quivered as her brother squeezed the sodden crotch of her panties, rubbing up and down along her crotch, from the top of her pubic mound, through the ultra delicate center of her slit, to the bottom of her rump. Everywhere his paw went more kitty juices seeped out, stimulating her parts.
“Some of it even leaked out.” Niko murmured, moving to feel around the moist fur of her thighs. 
“Ye-mmfh!” Koniko didn’t know how to feel about that observation, big girls don’t wet their panties, and they especially didn’t leak from them. But every time she tried to ruminate on that thought, another soft touch and a contradicting sharp jolt from her bladder sent her brain into overdrive. She panted, her hips bucking, her muscles straining not to give into those fiery pangs. It was so intense, she felt like she could explode, but in a good way! Gosh, she could just melt under her brother’s touch. Gosh, it sure felt like her bladder could!
“You have to go so bad…” Nikoli said barely above a hungry whisper. His eyes looked completely entranced with his sister’s face, reading the desperate, flustered need on her face.
“Y-yeah…” 
“You really wanna go potty…I think I can feel it.” He cupped her crotch, probably noticing the urgent throb radiating from her privates.
“Y-yes!” Koniko squeaked out. Just hearing the word ‘potty’ increased her level of need.
“Even after letting out some, you’re still so full…” He used his other paw to gently rub over her bladder.
“Aaaaah!” Koniko cried out, squeezing her thighs around the paw on her crotch. That touch hurt so good.
Nikoli chuckled. “I bet you’re holding in a big sloshy ocean.” He gave it little circular rubs with the tip of his finger.
“Hoooooh…i-it feels like it…” She huffed, trying her best to relax under his touch.
“It’s gonna squirt out of you so fast when you get to the potty.” He squeezed her privates once more. “If you can even make it to the potty…”
“Mmmmm…” She could only imagine, it would all force itself out of her so hard, she wouldn’t even need to push it. Ung, at this rate it might happen the second she stands up. Just an instant euphoria. Ooh, it would be heavenly…
“You might not even get your zipper down in time.” He smiled, noting the warm liquids accumulating on his fingers. “Your body’ll be so excited.”
“I-it already is!” Her body sure felt excited. So warm and tingly down below, like a fire that started in her vulva. And the only thing that could extinguish it are the waves of her golden ocean, hmph.
“It’ll be like the biggest waterfall ever. I bet it could cover the whole floor!” He said with a giggle.
“Hmmmmnnng, a w-waterfall…” Oh, it would feel better than a waterfall. It would feel like, like, one thousand waterfalls, all rushing out of her, all exploding out of her slit, and thundering into the potty underneath her. All the burning, stabbing, tightening need between her thighs instantly gone, and all the pride of keeping her pants dry taking its place. But best of all, her big brother would be right there as a witness. During all those amazing feelings down in her cunny, Niko would be giving her all the pets and hugs for being such a big brave girl. Mmph, petting her head, then rubbing that spot she likes behind her ears, then down her shoulders, her neck, her chest, then leaning in for a kiss on her forehead, her cheeks, a long one on the mouth, all the while his paw goes lower down her tummy, and then…h-hah…haaaaaa.
“Oh, Koni, Koni!”
“H-huh?” Koniko blinked, suddenly aware of a hissing sound, and an incredible heat flooding her crotch…oh no. “Ha-ah!” She cried out, her hips bucking off the bed as her muscles clenched down once again. A raging wall of trapped urine crashed against her closed privates, sending those familiar pangs ringing throughout her body again. “Aaah, o-oooh…” She whined as Niko pulled his paw from between her shaking thighs. 
“Wow…” He nearly went crosseyed examining his glistening paw in the glow of his lamp. “You almost peed your jammies for real!”
Koniko let out another mewl, ‘almost’ seemed too generous. She could feel the warmth trickling backwards from her raised hips, some excess pee seeping into her upper crotch fur, some in the spaces of her rump, and some in her thigh fur. She really, really, hoped none of it leaked out on Niko’s bed.
“Woah!” Niko perked up while staring down her thighs. “A little came out!” 
“I-it did?” Her heart dropped. Even through all the burning, screaming sensations in her body, she felt the sting of tears arising quickly. Her worst nightmare just happened… “Ah!” Her muscles clenched, feeling a finger prod the center of her crotch. All the moisture underneath that spot gushed around her privates. It was so warm, clearly very fresh.
“There’s a little wet spot.” Niko’s voice was full of glee as he circled that patch. Koniko could feel from the path of his finger that was perhaps about the size of a quarter, barely an accident, but still far beyond what a big girl should make.
“D-did I w-wet the b-bed?” She choked out, entangled in pleasure and guilt.
“No, it only got your jammies wet…I guess we should really get to the potty now.” There was a hint of disappointment in his voice.
“Oh…” Thank goodness, hearing that was almost as much of a relief as actually going potty…almost. She gently lowered her hips, and slowly sat up. “Ah, o-ow…” Everything was so sore and hot. She had to pause for those urgent embers to extinguish.
“I'll check for monsters in the hallway first, just stay behind me.” Niko so easily hopped off the bed and walked to the door in a way that felt impossible for her at the moment.
Impossible, but brave big girls don't give up on ‘impossible.’ She took a breath, tensed her muscles in preparation, and did what she’s done thousands of times before: stood up. “Nnnnrg!” Gravity hit her like a truck. Her resolve lasted for only two more steps before she doubled over, the weight of all that mean pee nearly took her all to the floor. Her paws clamped down on her crotch as more clammy liquids trickled through her thigh fur. She couldn’t tell if it was newly released, she couldn’t even tell if she was actively peeing, it was all so numb, so extremely, suffocatingly sore. She couldn’t, literally couldn’t, take another step.
“I checked, there’s no monsters!” Nikoli announced. He turned expecting to see Koniko by his side, but instead found her far back and trembling by his bed. “Koni? What happened?”
“I-I c-can’t hold it!” Koniko sobbed. “I-I’m gonna explode!” She shook with genuine fear, she’s never felt so tight and heavy before. All this pressure must be exactly how it feels right before a bomb goes off.
“O-oh my gosh!” Niko skittered back and placed a paw so gentle on her shoulder, as if trying not to break her. “Can you walk?”
“N-no…” This was it, Koniko’s throbbing loins made that clear. She was gonna burst like the little wet baby she is, right in front of her big brother…r-right in his room too. But wait…this felt abstractly familiar. Like recognizing a flavor that was described but never tasted…oh yeah! Just a year ago, post night-time accident, Niko told her he wouldn’t be mad if she had an accident in her room…actually he seemed kinda happy to hear the possibility. That moment lived in her head every time she potty-danced past his door, she always wondered if it was one of those weird big cub straight-faced jokes or serious…she really hoped it was serious. “Niko?” She looked up at him with big vulnerable eyes, needing to crane her neck from her body’s bent-over position.
“Yeah?”
She gulped, fighting back more sobs. “C-can I p-pee m-my jammies?” The words felt so strange on her lips, it only made the rest harder. “R-Remember when you said I could go potty here and, a-and you wouldn’t be mad? I-I d-don’t think I-I’m gonna m-make it…”
“Oh…” Nikoli blinked before he broke into a couple chuckles that didn’t sound like the natural ‘super giggly’ kind, Koniko didn’t know if that was a good thing. “W-well, if you really have to…” His eyes shifted away nervously despite the smile on his face.
“I do!” She wailed. Everything below her waist was on fire, she needed this more than anything. Her knees instinctively crouched down, muscle memory from those padded days that felt far too recent. In those moments, just like now, she’d be overcome with all the potty signals her body had been yelling for so long. A squirt or two right before her steps grew crooked and she dropped into a squat. She’d mewl and shiver as a hard stream roared into her padding without even a push, the material growing so hot, heavy, juicy, and smothering her crotch with such a strange yet heavenly feeling. Mmfh, her kitty parts quivered at the memory. Supposedly a potty trained big girl now, and yet there she was looking back on her diaper days biting her lip…
“It’s Ok,” Niko got on his knees to grasp her paw. “I promise I won’t be mad. And I won’t tell Mom or Dad either.” 
Koniko’s heart threatened to beat out of her chest. Her big brother looked at her with such caring eyes, he always had that same protective, mature aura from her potty training days. He was so happy to see her trying her hardest to be a big girl even if it didn’t always work out…oh gosh…she couldn’t do it. Even as she was on the verge of exploding, throbs wracking her body on every breath, and the deep squat squeezing her bladder like a stubborn lemon, she couldn’t give up like a baby. Not in front of Niko. She’ll be strong for him.
“Did you do it yet?” Nikoli reached a paw down to cup her crotch. 
“Aaah!” She yelped, another blaze shot through her privates. She snapped back to her feet, legs practically glued together as clenched her muscles for dear life, panting out through grit teeth. A vivid rainbow of fire, pleasure, and a pulsing numbness attacked her senses, begging her nerves to release, but she kept up the fight! She was gonna be a big girl!
“K-Koni? Koni?!” Nikoli pat her shoulder, perhaps fearing he broke his sister. “A-are you Ok?”
“I-I’m…” She squeaked out as the pangs passed over their apex. Her body shuddered, feeling all those waves slowly course out of her, those subtle flames of pleasure giving her one last tingle. “I’m Ok…” She sighed. Once again she was left with that heavy bloating pressure above her crotch, but at least now she could stand mostly still…with a paw between her legs…and occasionally scrunching her toes.
“Oh…you only peed a little.” Niko kneeled to observe a wet patch along her thigh. It was much more dramatic than the first spot, running from the crotch of her onesie with the length and width of his paw. “Do you wanna finish?” He asked, tilting his head as he traced it with a finger.
“N-no.” Koniko sputtered, feeling her bladder jumping. That spot on her body was so ticklish, she hoped Niko would touch it more often. “I-I wanna go p-potty.”
“Ok,” He stood back up, returning that warm smile that ever so slightly soothed Koniko’s sore bladder. “I already checked for monsters, we’ll hurry before they come back!”
“Ok!” She beamed, so proud she stayed a big girl for him. With his smile she felt like she could hold it for another hundred years if she had to! …And then she actually started to walk.
Nikoli kept true to his suggestion to hurry, tugging his sister along with quick wide steps. “Quick, quick!” He encouraged as she started to lag.
“Mmmfh!” Koniko whined, feeling her inner ocean rebelliously thrashing around, sending a barrage of pangs through her searing privates. She grit her teeth, just trying to bare through like a big girl, but ah, it all came closer and closer to slipping out each time she opened her legs. “Nnnnng…” She squeezed Nikoli’s paw tighter, just clench, stay tight, focus, focus… “Ah!” Mid-step, over the course of a split second, she was suddenly overwhelmed with that familiar frizzy feeling of her muscles losing control. “Niko!” She froze in her tracks, nearly tumbling over to the floor. Both of her paws flew to her crotch, but not fast enough to stop another leak. 
“Koni!” Nikoli turned back to hold her trembling shoulders. “Sorry, did I go too fast?” He squinted, trying to see the state of her onesie through the darkness of the hallway. “Did any more pee come out?”
“Y-yes.” Koniko took deep shaky breaths to keep from sobbing out. Indeed, she could feel a couple of fresh new trickles rolling down her thighs, hot enough to make her gasp. Though, she immediately went stiff as a board when her brother bent down to her crotch and took a long sniff. She recognized the steamy, refreshed ammonia scent stinging her nose soon after the mini-accident. Niko definitely would too, and then he’d know just how big of a baby she is…
“Woah,” He stood back up, wide eyes blinking and smiling like when Daddy gives him a catnip treat. “It was a big leak.”
“Y-yeah…” Koniko sniffed.
“Don’t cry,” Nikoli gave her a hug. “It’s Ok if you wet a little, you’re still doing your best. And if you do have an accident, I’ll keep it a secret.” He ended with a kiss on her forehead. “You wanna keep going? I promise we’ll be slower.” 
Like magic, Koniko felt all her pangs go away. “Ok.” She just nodded with an eager little smile. She had the best big brother ever.
“You can do it, we’re almost there!” That was a very generous claim from Niko, they were just halfway down the hall and they still needed to head downstairs to reach the potty. But for now, Koniko just purred as he rubbed her back, choosing to believe every word.
Slower and steadier they continued. Koniko took careful measured steps, keeping her thighs close together and ignoring how much wetness it squished out of her underwear. Her irritated bladder twinged from all the constant movement. But of course, a big girl like her could handle it. 
“You Ok?” Niko asked.
“Mm-hmm!” She nodded back with a brave smile.
He sniffed the air. “Did you leak again?”
“Nope!” She felt just a hint of nerves as Niko kept sniffing. She really hoped he couldn’t smell the lukewarm kinda-old pee that got squeezed out of her panties, that doesn’t count!
“Hah…good job.” He said upon exhaling, the edges of his maw curving into a small satisfied smile. “Are you ready to go downstairs?” He asked as they finally reached the end of the hallway.
“Yeah!” Why wouldn’t she be? She’s a big girl, and with her big brother by her side, they could beat up any monsters! Although…looking down the stairs, they seemed a lot longer and steeper than she remembered. Mmmfh, it made her hips start squirming again. But, s-she’s a big girl and she’s with Niko, she can make it! 
Full of determination, Koniko casually went down the first step like she would any other day. “Hah!” Instantly, a hard spasm rocked her lower body. Sharp tingly feelings flooded her privates once again. She felt that desperate twitch deep inside, so eager to finally release the pressure.
“Koni?”
“I’m fine!” She blurted out, she couldn’t let him see her breakdown, not this close to the potty! “Aah, o-ow.” Two more steps down, left foot, right foot, and her body locked up again. No matter how tightly she held her crotch, the roaring stab between her legs wouldn’t go away.
“Are you-”
“I-I can do it!” Her throat tightened with all the strain. Another step down, left foot. “Nnnnng!” Oh gosh, her hips swayed back and forth, her legs wanted to dance so bad. Her whole body wanted relief so bad. Another step, right foot—“Aaah!” Her jittery legs threatened to drop from under her, her paws left her crotch to grab the hand rail. “Oooooooh…” She mewled, her body twisted and her legs pretzeled precariously at the edge of a stair. Her privates went numb, she had returned to that dangerous point where she could no longer feel an accident escaping. She couldn’t do it, she needed help. “N-Niko!” She sniveled.
“I got you!” In an instant, her hero wrapped a steadying arm around her middle, and retrieved one of her paws from the rail to hold in his. “You’re Ok, you’re Ok.” He cooed in her ear.
It’s not Ok, she’s not a baby and yet she’s here crying, and probably soaking right through her panties. It gave her such a horrifying déjà vu from last year where the stairs had proven her downfall. She wasn’t gonna let it happen again. “I-I’m g-gonna go…”
“Huh? Woah!” Nikoli was unprepared for Koniko’s sudden crosslegged hop down to the next step, he had to grab the rail to brace himself as well. “Be careful!” He pleaded as he rewrapped his arm around her.
“Hnnng, a-ah.” That harsh landing felt like fire, and the gentle squeeze Nikoli put on her waist only made the feeling more suffocating. It only gave her more reason to hurry. “Ah…ow…ha-ah…mmf…o-oh…aaaaah…” Hop, after hop, after hop, each one slowly eroding any willpower she had left, mentally and physically. But, she had to keep going. 
“Hah…hah…mrrrrng…aaahh…” Finally, finally, she reached the bottom. Her tongue hung out as she gasped desperately for air. Her twisted legs were engulfed in heat, she couldn’t tell if it was her accident, her exhausted muscles, or both. She could’ve collapsed into a heap of pink fur and golden water right there, a cruel replay of last year, but Niko’s firm grasp, her hero, was the only thing keeping her on her feet.
 “K-Koni,” Though, her brother seemed to be shaking just as much as her. All of his sniffs and heavy breaths made her ear twitch. “I-I think you…” 
“Oooooh…” Before Koniko could gather her bearings, she melted at the feeling of a paw groping her privates. She was left so sensitive from the events just moments ago.
“It’s really wet…” Niko’s voice was low and hungry. He felt around her crotch, prying her thighs uncrossed to investigate that humid tunnel of wetness, and reached back to the beginnings of her rump. 
The feeling was coming back to her legs, but certainly not yet their strength, she was helpless but to lean back against him and squirm. The insides of her pajamas felt exactly like what she imagined a rainforest would: hot, steamy, moist, everywhere. And beneath those little explosive teases of pleasure as her brother explored her, she could feel even more drizzles squish and trickle down her most intimate spaces. It was oddly refreshing after how brutal the stairs was, but those needy, sharp sensations buzzing around her vagina told her for sure that her bladder was far, far from finished. “N-Niko,” She bit her lip. A knee rose to grind her thigh, but it only worked to squeeze his paw harder against her crevice and sent more shivers up her spine. 
“You still need to go potty, don’t you?”
“Y-yeah…” She sniffled. “A-am I r-really wet?” She could feel nothing but moisture as her legs squeezed together, her pajamas must be soaked.
“Yeah,” Nikoli pulled his paw from between her thighs, making her gasp. “It’s so wet my paw’s drippy.”
When Koniko squinted, she could see two slow drips falling from off his fingers. “N-no…Mommy and Daddy are gonna see it…” She crumbled into a sob. She was so wet that it was officially an accident, no doubt it was gonna leave a massive stain, dwarfing the existing patch on her crotch. And if they wouldn’t see it, they’d certainly smell just how big of a baby she is. And the worst part? She still needed to go so bad.
“It’s Ok Koni.” Nikoli pulled her into a hug, unbothered by her drippy clothes.
“B-but Mommy and Daddy are gonna make me wear diapers again!” It was so unfair, she was going backwards in potty training, even after she made it this far! She really is a big baby…
“If they notice, I promise I’ll tell them how brave you were! How you tried really hard to hold it even when your body was really mean and tried to pee in your sleep, and even when it was really hard to go down the stairs! And…” Nikoli rubbed a light paw over her bladder, making his sister shudder. “You still have to pee, right?”
“Y-yeah…r-really bad.” She huffed as Niko continued to circle a finger over her bladder, tracing from just under her navel to just above her crotch. It evoked so many sharp feelings from the sensitive muscle herself, while that tingly, needy burn between her legs rose again and put a stop to her tears.
“Well, that means you still need to get to the potty. And even if you get more wet along the way, you’ll still be a big girl for trying.” He ended with a comforting soft voice and a nuzzle. 
Koniko exhaled, feeling all of her stress, all of her fidgets wash away in his embrace. A purr grew in her throat for those last precious seconds before he broke away, and then she found herself captivated in his eyes. Because of him, for him, she was gonna be a good girl. “Niko?” She returned his gaze with a demure little smile.
“Yeah?”
“Can I have another kiss before we get to the potty?”
“Sure.” With a warm smile, he delicately cupped her cheek in his paw, and leaned down to softly kiss forehead. “Did that make you feel bet-mmmm!”
Just as Niko pulled away, Koniko rose to her tiptoes and gripped his face to pull him right back—for a real kiss! The big grown-up mouth-to-mouth kind with a lot of happy noises that she wanted to try again so badly. Niko surely must’ve remembered last year’s sloppy attempt, and quickly relaxed into her advances. His squeaks of surprise melted into a moan of passion. She could feel the purrs from him reverberating through his lips and rumbling between their chests. 
Koniko happily had no idea what she was doing, mewling and murring her heart into her brother. Her tongue explored his maw, skimming over his teeth, brushing the roof of his mouth, burying under his tongue, tasting all the vaguely familiar flavors. When she forced her tongue into a new area the bigger kitty would flinch and a quick whine would interrupt his purrs…Koniko fought to hold back her giggles at it. But then her little mind contemplated on how silly the act was…mushing their muzzles together, flip-flopping their tongues around…Niko would drone ‘ewwww!’ when he saw something like this in movies…Koniko couldn’t help herself.
“Mmfh?” Nikoli blinked. His sister’s grip weakened, and she shuddered as she huffed chuckles into his mouth. “K-Koni?” He pulled away at the peak of her giggle fit.
“Hehehe…” She pulled him into another hug. “I love you Niko.”
“I love you too Koni.” Now was Niko’s turn to chuckle, feeling her hearty shivers in his grasp. He squeezed just a bit tighter, giving her a taste of her own medicine, and a small whine slipped out of her. “You still really have to go potty right?”
“Uh-huh!” She nodded cheerfully despite her twisted legs. Her loins sizzled with two kinds of desire, and the one for her brother was winning. 
“Ok, we’ll go slower this time.” Niko leaned in for one more cheek kiss, and a quick feel of Koniko’s crotch that made her squeak. “Still warm…” He took a deep huff of the moisture on his palm, and a shiver traveled from his ears down to the tip of his tail. “Hah, my nose tickles.”
With a comforting arm draped around her shoulder, Koniko continued along her brave journey to the potty. It was just around the corner from the living room and down the hall. Each careful step made her breath hitch, the most gentle shifting of her weight made her embattled bladder cry out, but she stayed strong. Paws locked onto her crotch, grit her teeth into a smile each time she felt a whimper in her throat. She was gonna make it! No matter how much it hurt, or throbbed, or made her legs shaky, or felt like it was gonna explode, or…o-oh gosh!
“Mmfh!” Just the tiniest wince escaped as she paused to double over. Her crotch was engulfed in that numbing fire again.
“You Ok?” Nikoli asked, rubbing down her inner thigh.
Koniko tensed at his touch, she felt a constant stale moisture underneath the route of his paw, but nothing fresh—no leaks! “Y-yeah.” A quick nod and her shaky steps resumed, so determined she didn't even wait for those roaring tingles to calm.
In due time, they turned the final corner and the beautiful trophy-esq porcelain of the potty was visible. “Look Koni, you're gonna make it!” Her dear brother announced, hopefully not prematurely.
“Yeah, yeah!” Adrenaline pumped through her veins, excitement overwhelmed her privates, and suddenly all those harsh bladder pangs disappeared. She could barely feel her legs anymore, but she put all her heart into the final high speed shuffle down the hall. When she and Niko crossed the finish line into the bathroom, she was on top of the world.
“You made it!” Nikoli cheered. He turned on the light, illuminating the room in all of its heavenly sterile white. 
“I made it! I made it!” Koniko could've jumped for joy if only her bladder would let her. In the light, the state of her onesie was much more obvious. Large dark oblong stains trailed downwards from her crotch along the insides of both thighs, reaching to her knee on the left, and half way down her leg on the right. But they didn’t bother her, nothing could have bothered her at that moment.
“Good job!” He gave her cheek a quick nuzzle and urged her along. “Get on the potty, hurry!”
Though, Koniko couldn’t help but turn to him for a very important question. “You wanna watch?!” 
A range of emotions went through Nikoli’s face in quick succession. Wide eyes and twitching ears soon settled into a befuddled open mouth. “Um…”
“It's gonna be a lot, and it's gonna be so loud!” She giggled, a blush on her cheeks. “I'm gonna break a world record!”
“K-Koni…” A mirrored blush appeared around his maw too.
“Yeah?” A bubbly smile awaited Niko's response. 
“Koni,” His expression softened into a sympathetic grin as he lifted his paw to point. “You're already going potty.”
“Huh?” At that moment, Koniko picked up the sounds of trickles and an even louder hiss. She followed his pointed finger down, but she already knew what she'd see. The entire bottom half of her onesie was rapidly turning dark, and glistened with an oversaturated sheen of urine. Her pee was in such a rush to leave her needy insides that it flowed under and over the fabric, trickling down into an expanding puddle around her feet. Steam rose from her puddle and burned her nose, it had a scent that was familiar from so many past wet nights.
The feeling of her release hit just as the first tears started to break. The exhausted burn in her legs was replaced with the even hotter sensation of fresh kitty juices completely soaking every inch of fabric and fur. Urine gushed from her slit at an incredible rate, faster than it could leak through the fabric of her padded underwear, causing a hot pool to flood around her most intimate parts before it could rain through. The numbing, aching fire in her crotch was extinguished with the most heavenly, soothing release of pressure, traveling from within the throbbing walls of her vagina to send waves of pleasure up her spine. 
A single sob escaped her gaping maw before it broke into a breathy moan, and her eyes rolled back. All the overwhelming sensitive feelings made her want to squirm, but she also wanted to bite her lip and savor how they made her muscles tremble while trying to stand still. Her body split the desires and turned her into a gasping, shivering mess. Oh gosh, it felt so, so, good. Inside and out, everything was so warm and tingly and tickly and mmmfh, she couldn’t catch her breath as the feelings went through her. Oh gosh, she wished Niko would feel her again…oh gosh, she’s peeing herself in front of Niko!
The next breathy moan was followed by another sob and then another. All the days of potty training, all the work it took to get here without exploding, all the effort just to get out of bed, gone. Yet another wet night on her endless record, Another night proving she’s a giant, wet baby. Her parents were gonna diaper her for sure. And the worst part? It was all in front of Niko. He was so proud of her, he called her a big girl…not anymore. 
The hiss under her pajamas grew quieter until it had finally ended, leaving the hot fabric latching to every part of her bottom half, and a lasting bittersweet feeling of emptiness. She finished, just feet away from the potty, with a massive puddle on the floor the size of her shame. It broke a record alright, just the one she was afraid of the most. Her sobs grew to outright bawling. She reached out her arms to nothing in particular, she didn’t even know she was raising them. Her broken heart just needed something to hold on to.
Good thing Nikoli was there to fill that space. “Sssssssh, it’s Ok.” The bigger kitty pulled her into a hug, no fear of stepping into her puddle. He gently pressed her wailing muzzle into his shoulder, muting the loudest of her sorrow from their parents. “You did your best Koni, you’re still a big girl.” He whispered into her ear.
The sound of that made Koniko’s heart jump, it felt so undeserved. She wanted to say ‘sorry’ for getting his feet wet, for waking him up just to fail anyway. But, no words could form between her tears. 
“Don’t cry…”
Koniko gasped as a paw gripped her crotch once more. “Aah-h-haa!” Her head leaned back, and a moan broke through her sobs. Her kitty parts were left ultra sensitive after such a dramatic release, and the liquids leaving the soaked fabric to run down her slit made her squirm. Oh gosh, it’s like she had to pee again, but deeper and warmer inside. Her tears were so confused. “Ha, ha, ha—hmmm!” 
Her cries were cut off by Nikoli’s lips suddenly meeting hers. She flinched, but gradually started melting in his embrace, letting his tongue explore parts of her mouth, letting her sobs huff his mouth until they transitioned into needy mewls. She squeezed her brother tighter, wordlessly encouraging him to explore her more, her shaking thighs squeezing desperately around his paw, her tongue trying to find more of his taste. But just as she wanted more, Niko pulled away far too soon.
“How do you feel Koni?” He asked in a low voice, a warm comforting smile on a smile maw.
Koniko looked up at him with a pout. “...Better.” 
“You did a good job Koni.” He gently caressed her face, and for a moment, Koniko forgot about everything that had occurred over the past 10 minutes. It didn’t matter…her brother said she did good, and she just got her reward. “Hold on.” Nikoli broke away from the hug, and Koniko suddenly felt colder, partially literally. Her soaked onesie had slightly cooled to a more clammy, tepid temperature that made her fur feel icky. It was all too familiar to the all too recent memories of a cooling soaked diaper. Nnmh, she felt herself verging on tears again. Her thumb instinctively found its way to her mouth, and almost immediately she felt her nerves calm…gosh, she really is a baby. “Step on this Koni.”
Koniko blinked, coming back to reality. Her brother had laid a towel down in front of her feet, she stepped on it without even questioning it. She then watched, thumb in mouth as he unfolded another and it just barely managed to soak up all of her accident off the floor, every inch of it turning dark. She really went a lot… “Mmm!” She jumped at a touch around her thighs.
“Sorry.” Niko chuckled. He kneeled at her side, patting and rubbing the wet onesie with a towel.
“Mmmm…nnng…” She whined around her thumb. Her brother's rubs reached her crotch and grew more thorough, reawakening the throbs in her privates. She strained not to twist or grind her legs, something Nikoli noticed.
“You really like it when I touch you here, huh?” He asked, looking up at her with a playful smile.
“Mm-hmm.” She nodded back. Though, she liked it when Niko touched her anywhere.
“I like to touch you here too…” He gave her a tease with his finger, before he pressed his muzzle right into the nook of her crotch and took a long, deep breath.
“Hoooh!” Koniko gasped, her eyes rolling back, her thumb falling out of her mouth. She felt hundreds, thousands of shivers flow from every inch of her body, down to her slit, and into her brother’s eager nose. 
“Haaaaaaa…” Nikoli let off with a long exhale, the drunken, dreamy eyed look on his face looking similar to his sister's. 
Koniko blinked, confused, and overwhelmed with so many feelings. “B-but…I-I'm all wet…” She could smell all the strong, stinging scents of her accident filling the room. It was the unpleasant, pungent scent of a big baby.
“I know…” Niko climbed to his feet, a bit wobbly from his experience. “I like how you smell.” He wrapped in her a hug, kissing and nuzzling her cheek. Koniko could feel the deep purrs in his chest, he meant it…he likes her being a baby? “Mmmm…we should go to bed.”
Koniko watched as Nikoli went on to put the wet towels from the floor into the hamper. She wanted to question if Mommy and Daddy would notice them in there, especially with the smell, but it wouldn't have mattered. Her onesie was soaked, there's no hiding this accident. So she kept watching, thumb in her mouth, doe-eyed like the helpless baby she was, until her brother finished.
“Let's go to my room, Koni.” He offered a paw.
It made her feel just a little bit better to finally leave the scene of the crime. But, paw-in-paw, thumb in her mouth, she couldn't shake the feeling of guilt. Her brother was so proud of her for trying so hard, and was so happy to get out of bed to help her make it…and she let him down. He had to be so disappointed… “Niko?” 
“Yeah Koni?”
She had to look away. “...Do you think I'm a baby now?”
“Of course not Koni.”
Koniko’s ear flickered, she could hear the amused smile in his tone. And when she looked up, indeed his warmly grinning fangs shone through in the dark hallway. “R-really? But I’m wet…”
He paused to turn to her, gentle paw on her head. “Like I said Koni, you’ll always a big girl for trying. And I’ll always love you for that, no matter how many accidents you have.” He ended with a kiss on her forehead.
“Do you think Mommy and Daddy will think I’m a big girl too?” She asked, a hopeful smile sprouting on her lips. Though it faded when the look on Nikoli’s face turned sympathetic.
“Well…I don’t know.”
“They’re gonna make me wear diapers now,” She mumbled, her voice full of cubby dejection. “I wish I wasn’t such a baby…”
“Don’t feel bad Koni,” Niko rubbed her shoulder and went on in a lower voice like he was telling a secret. “I think it’s kinda cute when you don’t.”
“...Really?” She looked up at him and found a growing blush on his face. She didn’t know what the growing feeling in her tummy was, but it felt good.
“Yeah…it’s really cute when you’re all wet and shaky and meowy.” Nikoli slipped a paw down to her crotch for a quick squeeze, chuckling when Koniko let out a surprised mewl. “Just like that!” He then brought that paw to his nose for a sniff. “Mmmm…and I really like the smell your accidents make too.” He wrapped his arms around her, leaning his maw close to her ear. “I wish you could be all wet, and squeaky, and smelly all the time…” He purposely enunciated his words, drawing out his whispers to make her shiver. 
Koniko let out a choppy giggle as she squeezed back. She didn’t really know how she was a big girl, but she made her brother happy, and he likes her just the way she is. And that’s all that mattered.
“You wanna sleep in my room Koni?”
“Yeah!” At the sound of that, no monsters could’ve slowed her down heading back up stairs. Though, she stopped in her tracks upon reaching his room and staring down his nice, clean, dry sheets. 
The bigger kitten casually plopped down on his bed. “What’s wrong Koni?”
“I’m all wet…” She mumbled back.
“That’s Ok.” Nikoli stood back up and wrapped in her a suspiciously tight hug.
Koniko had just recognized the mischievous chuckle on his lips before she felt herself being lifted off her feet. “Niko?!” And then he turned the pair around so her back faced the bed, she knew what was coming. Giggles started to break her cries. “N-Niko noooo!” But it was too late, a short hop forward and they both came crashing down on his bed with a bounce. A giggly Koniko so conveniently broke his fall. “You’re so mean!” She playfully pawed at his face.
“Sorry.” Though the smile on his face betrayed that apology. “Mmmm…” He wiggled his hips, grinding their crotches together. There was something stiff and twitchy straining against her through his pajama bottoms.
Koniko’s maw had just barely opened for a gasp before her brother leaned in for a kiss. She instantly recognized what was happening and relaxed to give him control. Niko seemed more empowered, more greedy this time. His tongue slipped and shoved its way into the intimate spaces of her mouth, while his wet maw pushed and bobbed against hungrily hers, evoking the most sloppy, satisfying sounds. Koniko moaned, so many confusing, exciting feelings running through her body. His eager presence felt so good pressing into her, it was almost like the times they wrestled, except it never felt this good to lose before. “Aah!” Her head flew back as she gasped. Niko bucked and grinded their crotches together once more, evoking an explosion of pleasure under her tummy…but also some guilt. “Niko! Niko!” She cried.
“H-huh?” The surprised kitten blinked out of his aroused stupor and lifted  himself off of her. “Yeah? Are you Ok?”
“Uh-huh,” She nodded. “But I’m getting you all wet…” In the low light of Niko’s lamp, she could see the slight dampness growing along his crotch and inner thighs. Her dear brother didn’t deserve an accident he didn’t make.
“Oh…” A giddy smile slowly grew on his maw as he looked down at the new stain. He flopped back down on top of her, nose-to-nose with his sister. “I’ll make us even more wet.” 
“Huh?” Koniko stared back in his eyes, waiting for an answer when she heard a familiar hissing noise arise. Soft, snorting giggles escaped through his nose, while a satisfied look of effort slightly lidded his eyes. She gasped. “Niko!” He couldn’t be! But then, her breath hitched when a sudden heat oozed into her crotch. “O-oh gosh.” She wriggled against him, the feeling of someone else’s accident was such a strange, intense feeling. Her privates and her butt were gradually engulfed in a steaming hot pool of kitty juices, soaking into the fabric of her onesie and completely flooding her panties. Every sensation, every throb was multiplied by 100 times over. She was at a loss for words, her flustered floaty-eyed expression contrasted the proud grin on Nikoli’s face.
“Now we’re both wet!” He beamed. “Now Mom and Dad’ll see we’re both ‘big cubs.’” He leaned down to give her a nuzzle on the cheek.
“Mmmm, Niko…” She smiled. Gosh, she truly has the best big brother ever…“H-hah!” She yelped as Niko grinded their crotches together. An intense pleasure surged through her soaked cunny, and she felt a throbbing need like never before.
“Ohhhh…” Niko couldn’t hold back a moan. “You feel so good…” He slurred as his hips started to buck again on their own.
“N-Niko…” Her voice shuddered, the feelings were intoxicating. But deep underneath the blaze of pleasure and desire, she could still recognize the erect, twitching length pressing against her. “Y-your, mmfh, peepee’s hard, aah, a-again.” A weak, innocent giggle broke through her sloppy breaths. Her brother’s ‘peepee’ was so funny and weird, seeing and just thinking of it always brought a smile to her face. But the idea that it wanted her, so desperate to feel her and her accident, even through multiple layers of clothes, mmfh, her hips started to buck off the mattress too. “N-Niko…” She bit her lip, everything felt so hot and she needed more.
“Koni…” He huffed back, his voice equally filled with love and desire. He lowered himself to press their chests together, his chin resting on her shoulder as his energy went into grinding, humping, faster, harder. 
“Niko…” Her brother was starting to go too fast for her to match his thrusts. Similarly, the fiery pleasure rising between her legs was coming on too quickly for her to adjust. It was like she had to pee really, very, super bad, but with none of the unpleasant tightness, only an even more angry throb. And hearing Niko’s visceral moans in her ear, knowing that he too was helpless to his loins, only made that feeling rise faster. “Niko, Niko…” She whimpered, squeezing his shoulders while her vision went blurry. “I-I gotta go potty again…” But she knew it wasn’t pee. Something was gonna happen, she didn’t know what but she couldn’t stop it. But she didn’t want to stop it.
“Me too…” He mumbled back, his body thrusting on autopilot. “Mmmmah…I can’t hold it.”
“I can’t either!” Koniko whined, that new desperate feeling rose, and rose, and rose until it hit a fever pitch that took her breath away and had her go stiff. Oh, oh, oh, it’s coming! “Niko!”
“Don’t hold it! Aah!” Nikoli squeezed tight. On that final embrace, that reminder of all her brother’s love, passion, and desire for her, Koniko did just as he said, and let that feeling explode. 
“Aaaaah!” Her eyes rolled back and her tongue lolled out as the most incredible, indescribable waves of absolute euphoria shot through her throbbing vagina and crashed over her entire body. Her mind went fuzzy as wave after wave sent a new shock to her core. No thoughts, no worries of wetting the bed, nor of being a big girl, she was a helpless little baby losing control of herself yet again, right under her big brother’s watch. Niko’s shudders reverberated through her as he too was overcome with blind pleasure, their bodies pressed together as one horny, huffing, grinding mass.
Slowly, those explosions started to calm, the peaks of the waves gradually lowered one after the other. She started to catch up to her racing heart and she noticed the soothing tingles starting to spread across her body. “Hah, hah, h-haaaa…” Her voice shook as the last final wave of her orgasm lingered. Her needy privates tried to hold on to that last rising pulse as long as it could, but much like her bladder—“Hah!”—its release was inevitable. 
Koniko’s head fell back to the mattress as a long satisfied purr rumbled through her chest. Her body felt exhausted…in a good way. Like she was just refreshed by a really nice tummy rub, or a really, really, really nice, long pee, and she was ready for a nice, long sleep. And the best part is that she had the best big brother in the world for a blanket. “Niko…” She whispered, a happy smile on her face. 
“Mmmm, Koni…” He muttered, a similar satisfied sleepy purr in his chest.
“I think I peed a lot…”
“Me too…I think.” Nikoli used the remainder of his energy to roll off of her onto his back. 
Koniko frowned, she missed his warmth already. Though, her eyes widened when she caught a view of him fully laid out in the glow of his lamp. He was completely soaked from the waist down, she’d dare to argue he was more wet than her! Gosh, that’s a lot for a potty-trained big boy. “Wow…” She trailed off as she reached over to grab his bulge.
“Hah, hah, K-Koni!” Niko squirmed and jerked under her touch.
She couldn’t help but giggle at the silly kitty. He was indeed completely saturated, the fabric of pajamas so full that a simple squish left her fingers drippy. It was still warm, and still strong with a musky kitty scent, similar to her own. But what really caught her interest was the jumpy semi-erection poking just underneath. “Does it feel good?” She asked as she gave it another eager squeeze.
“A-ah, it’s t-tingly!”
Koniko broke into a full laugh when Nikoli wrestled her paws away and fell back to his pillow with a relieved huff. Gosh, she loved him so much…and now he’s gonna get in trouble too. “Niko?”
“Yeah?”
“Do you think Mommy and Daddy are gonna give you diapers too?”
“Probably.” He didn’t even hesitate at the answer, and as he gently scratched Koniko’s ear, he didn’t seem bothered by the consequences either.
“You aren’t scared of…being a baby?”
“Nope.” He inched closer and pulled her into a snuggle. Koniko flinched, feeling the wetness re-embracing her rump and thighs. It was followed closely by a ticklish nuzzle into the crook of her neck. “I don’t mind being in trouble, as long as it means being with you.” He ended with a kiss on her cheek.
Koniko smiled. She would’ve loved to have turned around and squeeze him tight, and give him another super grown up kiss and squeeze his pee-pee, and give all the touches she knew he liked, but her little body was completely tuckered out. “Good night Niko, I love you.” She said, meaning those words stronger than she ever did before. She then settled into his embrace, thumb in her mouth, ready to be his baby sister forever.
“I love you too Koni.”