“Honey, where are you going?” Kirk asked before his daughter could reach the door. Considering what most fourteen year old girls wore on Friday night, she looked casual – a spaghetti-strap tank-top that hinted at - rather than showcased - her budding chest and a pair of shorts that, while revealing her perky behind, were still just casual summer-wear. But even though it was Friday it was only late afternoon, and as his gut churned he knew the answer that would roll out of that innocent little muzzle.
“It’s okay dad, I’m just going across the street…” she said, even though that was the last thing Kirk wanted to hear.
“Honey… your birth control pills… you…”
“I’ve stopped taking them a few weeks ago. Come on dad, don’t tell me you couldn’t tell. Your nose was twitching the whole day…” she said in the same casual tone a girl her age would admit that she hadn’t made her bed.
“Zoe, you can’t… I mean I… please…”
“Dad, you know you don’t get to tell me not to go, right? Luke called me over. And Luke told me to stop taking my pills.” She said, still in a calm casual tone as if her father was overreacting to something mundane.
“Not tonight. Just… please, tell him you’re not feeling well or… honey you’re in heat, you can’t…”
“Dad, please stop. I’m going to go over there and we’re… you know what’s going to happen.”
“When… when will you be home?” Kirk said, swallowing past a lump in his throat. The longer Zoe lingered, the harder it was to ignore that she was fertile.
“Probably sometime tomorrow. Maybe Sunday, depending on what Luke’s got planned. I’ll give you a call to know when to expect me.”
“Zoe, this is going too far. If you go there now… while you’re…”
“I know dad. I probably won’t be in heat when I come back. Then again I’m not sure. I’ve been letting Luke under my tail for about a month now, so he might wind up finishing there. Maybe he just wants me to smell… special. He likes to really get his muzzle in there so... either way, I’m going to let him choose. Whatever he wants to do, I’ll let him.” She said, dead serious.
“Zoe, I know what he has but… You don’t have to do this, we’ll figure something out…”
“Dad, I’m not the one being blackmailed here. You are. I want to go across the street, and what he has is there to keep you from stopping me.” she said. Her tone was… unnerving. Like someone patiently explaining something to a child. Gently patronizing, as if he weren’t her father, her only parent. It filled him with disturbing thoughts of what she was really like with the Rottweiler next door. Did she call him ‘Luke’, or ‘baby’ or… 
“Zoe, how… how can you do this to me?”  Kirk almost sobbed out, almost fell to his knees.
“Dad… you know this is your fault, right?” his daughter asked, the same sensible tone of voice, no malice even though she’d just punched him in the gut with those words. “You’re my dad… you were supposed to keep men like that away from me. Especially once I reached puberty. When I didn’t want to stay away from men like Luke. I was supposed to be your priority, but you… you chose your career, didn’t you?” she asked, again without malice, just daring Kirk to deny it by simply looking at him.
“You weren’t there. It was either work, or something work-related. Making connections, dinners and lunches, cocktails or golf games. Sometimes you’d dress me up and take me along, sort of like a doll. But Luke was there, and I was there, and he saw that you weren’t. He knew how to take advantage of that. Knew how not to come on too strong and scare me away. How to make it fun for me, like our little secret. How to touch me like I’d never been touched. And when I was ready, he knew how to make a woman out of me. How to do it so I’d keep coming back. And he knew how to make it so that you could never stop us, like you can’t stop me now…” she said and Kirk knew she was right.
He felt guilt, guilt he never felt but probably should have when he’d crossed a line no father ever should. He knew it was wrong, but when Zoe had suddenly started acting… different, showing such clear interest, even clumsily flirting, he… God help him he thought he was the luckiest man on Earth. He’d never quite lusted after his daughter, but he couldn’t fail to notice a beauty in the making. The golden retriever pup had her mother's looks without the acerbic attitude that had led to their divorce. A sweet girl on the cusp of womanhood living under his roof, showing that kind of interest.
He should have been more suspicious, should have noticed things. He should have let his head do the thinking, not the part of his body that he’d let Zoe play with, suckle on, the part he’d pushed in between her skinny thighs. She hadn’t been a virgin, but she could have lost that to her own fingers, the handle of her hairbrush, maybe even some clueless kid who had no idea what he was doing. He’d been sure he was her first man and she… she’d lied, acted perfectly, even begging him to go slow, whimpering how he was too big.
Kirk was secure in his looks, but doubted he was as big, let alone bigger than, the man who’d first had her. Who’d been having her for months before he sent her to seduce him. The guy from across the street who’d ‘accidentally’ walked in on them, and then laid everything down. He’d showed Kirk the footage Zoe had taken, the footage he'd told her to take. Their messaging transcripts where she’d encouraged him to talk dirty to her, to talk about what they’d do when she got home from school.
He told Kirk their secret, the one he’d be helping them keep. He wouldn’t try to stop Zoe, and if Luke needed to make up a cover story for why she was at his place or just around him, he’d be expected to back up whatever lie the Rottweiler came up with. If Kirk tried to report Luke… well, the retriever had no evidence, and Zoe had made it clear she wouldn’t testify against… against him. Luke had evidence, everything he’d need to have Kirk put away, and what was worse the yellow dog suspected he could also get Zoe to testify.
 The click of the door closing brought him back to reality. She hadn't even said goodbye, and in the silence he could hear her footfalls fading as she went to him with a spring in her step. Kirk's hands were shaking as he went to his liquor cabinet and poured a glass of scotch, not even bothering with ice as he knocked the first shot back and refilled the tumbler. He’d have a few drinks, just to steady his nerves and… it was Friday. He might get an escort, book a hotel room and try to do something in there that would take his mind off what Zoe was up to…
*******
Zoe heaved a sigh as she closed the door behind her, her mood quickly improving as she left her house and her father behind, as evidenced by the bounce in her step and the slight wag of her tail. She wasn’t trying to hurt him, but she didn't really care if she was doing it. He wasn’t around when she’d needed him and his attempts to cling to her now were pushing her further away from a man who meant so little to her now. She’d felt a little bad about sneaking around behind his back before Luke came up with the plan to keep them safe. After that, after what he did with her, she just couldn’t think of him as her dad.
Luke kinda was. Her dad and her lover. Zoe was smart enough to know that he’d seduced her, that he’d taken advantage of how naive she’d been. But knowing you’re addicted didn’t stop you from craving. He took her, but at least he wanted her, and he treated her nice enough for her to want to run across the street and knock on his door. But she was careful to look both ways along the sleepy little suburban road. No one was there to see her, which was ideal. If not, she would have turned left and strolled around the block, maybe to the convenience store to pick up some snacks.
She opened the door and slipped in. It was unlocked, but Luke had given her a key. His house wasn’t quite as big or as nice as dad’s but she liked it here better. She was fairly certain she’d be moving in here once she turned eighteen. She heard the whisper of blinds being drawn, a subtle sound that still had her ears swiveling and her tail wagging as she locked the door behind her. A learned reaction - good things happen once no one can see you.
“There’s my girl…” came a rumble rom the living room as Luke walked up to her. With the blinds drawn the light was dim and sort of swallowed the black parts of his fur, making the orange-brown stand out. He was wearing just an old pair of shorts, so there was a lot of it on display. Being called his girl made Zoe’s heart beat a little faster, her head tilting up to look at her lover.
“Kirk give you any trouble?” he asked as he pulled her close, one of his hands drifting down her back to the golden rump covered in thin shorts. He called him ‘Kirk’, never ‘your dad’. And Zoe was also getting in the habit of thinking about the dog across the street that way.
“No, he was just being… never mind. I don’t want to talk about him…” she said, refusing to let her mood sour as she pushed her nose into the spot where the big Rottweiler’s neck met his chest. “You smell nice…” she said. She knew that Luke took a shower before their dates, but he also did some quick workouts every time he finished a shower. It left him smelling clean, but not too clean. Male…
“And you smell great, sugar…” he said, nuzzling her floppy ear with his big blocky muzzle. It was close enough that she could hear him sniffing.
Her tail wagged but her thighs clenched at the thought. She knew why she smelled so good to him. He didn’t tell her what would happen when he asked her to go off birth control. He never did, which made it thrilling - each visit a kind of surprise. It might happen. If he wanted it to, if he lost control. It was a big deal - the idea that nine months from now she might be nursing a mix-breed puppy. But whatever he wanted to do, she knew she’d let him. He’d never given her a reason to say ‘no’, and in doing so had somehow robbed her of her will to say it. But he wanted her – wanted her around, wanted to spend time with her… if he wanted her to have his pup, Zoe knew she’d be happy to have it.
Like she was happy to part her muzzle for him, to let his tongue slip into her mouth. He held her tight as he kissed her, gave her perky ass a good squeeze, hard enough to make her tail shudder. She liked his warmth against her, his size and the power she felt in the arms holding her. Luke was in his early forties, and while he didn’t have a gut he was a little on the heavy side, with most of it being muscle. He’d shown her pictures of himself when he was younger, most of them taken poolside or on beaches with a lot of him on display. A lean young dog, with rock hard pecs and washboard abs. Most of the pictures also had girlfriends clinging to him. Zoe figured it was part of what he wanted her to see - beautiful young women with curvy bodies they kept pressed possessively up against him. They made her feel like she was still just a kid, but she was the one he was with now. It made her feel better than them, prettier. Or maybe Luke had grown into a dirty old man…
When both paws settled on her rump she hopped up on cue, her tongue still twisting around his as her legs wrapped around the large male hoisting her up. Luke was a fitness instructor, and still very fit himself. A few years ago she’d overheard Kirk on the phone refer to Luke as ‘a college athlete who didn’t have what it took to go pro’. Dad drove a better car than Luke, had a bigger house... but Luke was the one holding her in his big strong arms. She kept her eyes closed as he carried her and since they weren’t climbing stairs she figured it would be the living room couch to start with.
She smelled the blanket before she saw it. Luke washed it every now and again but it always carried the lingering scent of sex. Luke stopped but kept holding her up, kept kissing her deep enough to make Zoe’s stomach flutter. She’d never kissed a boy, never had awkward timid pecks before someone did it properly. Her first kiss had been from a man old enough to be her father, a man twice her size, but more importantly a man who knew how to kiss. Her knees had nearly given out the first time he did it, and it still thrilled her enough for Luke to take his time.
With her arms wrapped around his neck and her legs wrapped around his hips she was pressed too tight against him to miss the bulge in his crotch growing a little harder as the heat of her firm young body did its magic. Luke took his muzzle off hers and pushed it into her neck as Zoe panted, tilting her head up and submissively baring her throat to him. In spite of his size he was gentle when he set her down on the couch covered in the blanket that carried their scent.
The golden pup scooted to the edge and grabbed the waistband of his shorts, pulling them down and exposing even more cinnamon-colored fur, along with something smooth, glistening and red. Only a few inches were peeking out, deceptively slender considering how hard she knew she’d be straining when he was inside her. Luke kept his hands on his hips, knowing that the innocent-looking girl face to face with his sheath knew what to do.
With her left hand Zoe palmed the dark sack hanging low and full under the fat sheath, the two heavy orbs spilling out of her dainty little paw as she parted her lips and took the red rod into the wet warmth of her mouth. She pushed his sheath down with her muzzle, murmuring around her mouthful and pretending she could actually take Luke whole. Once he was fully erect there would be no way to do this and she’d be left stroking the red flesh as she slurped the tip. Enough to get the big dog horny, and even to get him off if that was what he wanted, but she never managed to get her jaw to open far enough so that she could safely take Luke once fully hard. She’d pulled it off with Kirk, and it irked her that she’d given her father something she couldn’t give to the man she actually wanted to be with. The one who cared.
Zoe bobbed her pretty yellow head back and forth, pausing only to swallow the pre Luke was leaking, bringing her second paw between his thighs to cup his heavy sack. She felt her thighs rub together as the Rottweiler’s testes rested in her palms, obviously full. It had been a while since they’d managed to find time for a date, and she was sure Luke hadn’t touched himself since the last time he’d emptied these inside her. But she hadn’t been fertile then…
By the time she felt her lips bump against the sheath-covered knot Luke’s tip was pushed into the back of her throat and her jaw was aching too much from the strain of keeping her teeth away from the thickening mass of male flesh. With some regret she pulled her head back, swirling her tongue around the leaky tip as she used one paw to slide Luke’s sheath off the lump that would make her whimper if he decided to tie. He didn’t always, but she was sure he’d do it now. They had plenty of time, and he had made sure she was in heat…
“Doin’ great, sugar…” the Rottweiler rumbled, getting a moan from the girl whose tail was wagging as she used one hand to stroke him, one hand to fondle his sack and was doing her best to slurp around the tip of his cock. And looking up at him as she did. One time he’d told her that she looked beautiful with her big blue eyes pointed up while she was going down on him and that had been enough to make sure she always looked up.
There was a thin string of saliva connecting the tapered tip to the pink tongue when he pulled her off, Zoe’s mouth remaining parted as she caught her breath and waited to be told what to do. Luke leaned down and placed his hands at her sides, running them up and picking up her top along the way. After he pulled it over her head she could feel his eyes on her budding chest – the two firm bumps that still didn’t need a bra, and the stiff pink nipples looking so prominent as she pushed her bust out.
“Scoot back a little, babygirl…” Luke said, his voice still gentle but carrying that little growly tone that did something to the impressionable pup, something she felt just below her belly.
She leaned back and wriggled her rump left and right to help Luke pull her shorts off her tush and then off her legs, noticing the dark spot on the crotch. When he knelt she lifted her legs and set them down on his shoulders, scooting back as Luke licked his chops. She felt his breath on the heat-swollen slit blushing a pretty pink under a slick layer of her honey as he gripped her waifish hips and pulled her back toward the edge of the couch.
His tongue was broad and it took two, maybe three sweeps for her messy cunny to once again be pristine, at which point the Rottweiler went to the source. A shuddering gasp left Zoe’s muzzle as her little paws grabbed handfuls of the old blanket, her chubby labia spreading easily around the tongue now delving into her fertile honeypot. Luke’s black nosepad was now pressing against her clit and she could feel him sniffing, drawing in the scent of a young bitch in heat.
Zoe’s face creased and a strained whimpering noise was forced from her as Luke began to eat her out. Not like… him, not a few licks just to get her wet enough. Luke always pushed his muzzle in so hard she could feel the sides of his canines pressing into her folds, not licking but eating her out like she was the best thing he’d ever tasted. It felt good too, so good that she was writhing on the couch as she struggled not to cum. It always felt better to wait, to make sure his cock was inside her when her pussy began to clench, to feel him throb every time she squeezed down on him. But she knew that if he wanted her to cum in his muzzle there was nothing she could do to stop it.
Luke knew her body too well, and once he’d brought her to a squealing orgasm with nothing but two fingers rubbing the spot just above her little hood. Her pussy had been completely empty and Zoe had been embarrassed when she squirted over the same blanket she was squirming on now. She’d been worried that she’d peed a little, but Luke had assured that it was sexy, and when he slid his cock into her a moment later he’d made her believe it.
Today, Luke was either merciful or impatient, kissing and licking his way up her body until he was looming over her as he pushed his tongue into her muzzle. After the Rottweiler broke the kiss he sat down next to the golden puppy, patting his thighs even though the girl was already moving to straddle him. With her knees planted on the couch Zoe could lift her crotch just high enough to guide the tip of Luke’s heavy cock to her heat-swollen sex. She used one hand to open herself up while the other pushed the tapered tip between her chubby labia. When she was sure he was wedged she slid down just enough to take two inches and make sure he stayed wedged, looking up into the older dog’s face as she rested her hands on his broad, thick shoulders.
His own hands were around her waist, not big enough to actually close around it but coming close enough to make Zoe’s tummy flutter. In spite of his grip he wasn’t pushing her down, choosing just to wait and admire the sight of the pretty pup getting ready to take the whole thing. He was strong enough to lift her up and down, and he might end up doing it by the time Zoe exhausted herself riding his cock, but for now he was letting the teen set the pace.
Zoe hissed and winced as she drove her hips down just a little too fast and felt a sharp sting between her legs. Whenever she came over, this first time (they rarely stopped at just one) was always a little like the very first time. It would be easier to sink down on Luke later, but for now her body was reminding her of just how young she was and how big her mate was. Inch by inch, she felt herself take more of the hard throbbing heat into her, the tapered tip making her stomach tremble as it rubbed its way along the wet, silky walls of her young sex.
She felt that tip reach her cervix just before her splayed folds reached Luke’s knot, but knew that she’d be taking the whole thing. It would just take time for her body to adjust, and the Rottweiler had assured her that even grown women had to work patiently to get all of him in. Zoe wasn’t sure if he was telling the truth but wanted to believe him because it made her feel more grown-up and because she didn’t want to think of Luke lying to her.
“Looking good, babygirl. Just take things nice and slow, OK sugar? We have all the time in the world…” he said, keeping his hands on her waist and running his thumbs up and down on either side of her belly-button.
Zoe waited a little, just enjoying the fulness as she swiveled around, the tiniest movement making Luke shift inside her in ways that had her tail wagging. She leaned forward a little, her forearms against Luke’s chest as she let the big dog take more of her weight. Her back arched and flexed as she pushed herself backwards and downwards, polishing the red length with her snug young sex as her heartbeat and breathing both quickened.
She caught a lazy and unsteady rhythm as she slid off Luke as far as she dared. Her young slit was very tight, especially at the beginning of each of their little ‘dates’, and more than a few times she’d wound up pushing his tip out by mistake. Making sure to keep at least three inches or so of hard, throbbing Rottweiler in her snug sex, she pushed herself back and forth on the rest, feeling a small sense of triumph when his knot finally started to push against her chubby labia.
“There’s my girl. Easy does it sugar…” Luke murmured, that thrilling growly tone creeping into his voice.
His hands moved from her waist, settling on the cheeks of her perky little tush as he groped them, rolled them around and spread them every now and again, making the little pink rosebud under her wagging tail open just a little. She wondered if he was going to take her tail again, but figured her ass was safe because he wasn’t pushing a finger under there. Taking it up the ass felt weird and a little scary, but Luke always made sure she came, so Zoe knew she’d let him. The first time he’d pumped her rump had been on a Saturday, and when Monday rolled around she had to brace herself and try not to wince every time she sat down at her school-desk.
Canine ears were keen enough for Zoe to catch the silken sound of her pussy clinging to Luke’s cock as she rode the old dog, and it was definitely keen enough to notice that the noise from back there was getting sloppy. But the sloppier she got the easier he moved within her, and soon enough Zoe was pushing back hard, grunting cutely as she made the knot bump against her messy cunny and the tip of the Rottweiler’s cock jab against her cervix.
“Getting tired, sugar?”
“Nggghhoo… not y-yet…” Zoe said, knowing she wasn’t very far off. 
She pushed herself away from Luke, sitting up straight on his lap and sitting down on his cock hard enough for the knot to almost but not quite sink in. She took the big dog’s wrists and lifted his hands to her chest, starting to bounce in short strokes as she tried to take his knot on her own. She could, a lot of the time, but usually Luke had to do it himself the first time. The Rottweiler’s hands were big enough to completely cover Zoe’s budding breasts, so he pushed them to the sides of her chest, tickling the golden puppy a little as his fingers slid under her arms and his thumbs extended.
“Mfffhhh! Like… that…” the pup grunted as Luke began to run his thumb-pads across her pale pink nipples, teasing the nubs to stiffness in a matter of seconds.
Even though they still weren’t very big, Zoe’s pubescent breasts were sensitive and seemed even more so now that she was in heat. She loved the way Luke played with them, even though they were still so tiny. And she loved the way he stared at them while he did, making her thrust her chest out and try and look as grown up and feminine as her waifish figure would allow. The big dog’s thumb went up and down, up and down, sometimes pressing hard against the firm young flesh and sometimes barely brushing across the pristine pink skin. 
Zoe almost bit her lip before she remembered that Luke liked hearing her. As long as she didn’t get to loud he liked the silly little noises he made when her tummy was starting to quiver and her breathing was coming in hard, the way it was now. She began to gasp, each new gasp higher in pitch than the one before until she screwed her eyes shut and leaned into Luke’s paws. He settled her down against his chest and held her there while the pup rode out her first orgasm, burying her muzzle in his neck as her cunny clamped down on the length of hard canine male spreading her open.
When the tremors passed, Luke didn’t bother asking her if she was tired. He just wrapped his big arms around her and lifted them both with ease. Zoe let out a happy little whine as she was lifted and then gently laid down on her back, with the big Rottweiler settling on top of her. She loved how strong he was and how he could just move her around like that. Kirk had never even tried, and would just pull out and tell her to get on her back or on all fours. It really killed the mood and made it hard for her to pretend she liked being with him.
Zoe lifted her legs, feeling his cock shift inside her until it was at that magic angle that she liked. Once she found it, her legs locked around the burly old dog, her arms wrapping around his thick neck as he rested his weight on his elbows. One time she insisted that she was strong enough that he didn’t need to do that and to prove her wrong he’d laid down on top of her for a full five seconds before she tapped his side to get him off. He’d proven his point – he was much bigger than her, but the way he proved it had left quite an impression on an impressionable young girl.
Zoe’s tail shuddered as he began to move, keeping that powerhouse body in check as he thrust gently but at a much steadier rhythm than she’d managed. He was going deep too, and the way her legs were splayed around him opened her up enough that she could feel her pussy dimpling in every time he bumped his knot against it. Age had given him just enough weight to hide his muscles, but Zoe could feel them now, the strength he was keeping a damper on just to keep from hurting her. She could feel herself being pushed along the couch just a little every time he drove in, and her paws could feel the corded muscle in his thick neck as he leaned down to lick the top of her head.
But subdued or not he was insistent, and laying under the big male the golden pup knew he wouldn’t be pulling out. The time for second thoughts had come and gone, and the whimpering girl wasn’t sure she’d let him pull out if he tried. But that knot was going in, prying her open little by little, every pussy-splaying push making her more desperate to feel it finally sink into her. Luke was making growly grunts, evidence of how hard he was fighting instinct that told him to just jam it in there and tie with his little bitch.
Zoe wanted to tell him to do it, but she couldn’t get enough breath to do it. Her body was stuffed with more than it should be taking and even the relatively gentle thrusts of the powerful male taking her were punching her breath out of her lungs with every pump of the Rottweiler’s hips. She felt Luke’s knees shift a little and the next thrust came in sharper, drawing a yip from her as the inevitable almost happened. A slow pull out that made Zoe’s toes curl and another jab, the sensation of her flower opening up almost wide enough before Luke pulled back again.
She had no idea how many of those thrusts she’d endured, but she was whimpering and almost clawing Luke’s back by the time one good pump of his hips pushed the knot in smoothly. There was a wet noise as every bit of wetness was squeezed out of her snug young cunny to make room, her drenched labia now wrapping around the bulge already starting to grow as Luke felt a tight, warm bitch squeezing down on him.
Zoe’s eyes were squeezed shut as she whimpered and whined, squirming a little as her body instinctively tested the tie and provided the male knotting her with enough stimulation to ensure that he grew to full size in her straining sex. She felt Luke put a finger under her chin and tilt her muzzle up before a broad tongue ran across her cheeks. Her ears flicked back in embarrassment when she realized she must have cried again, even though Luke had ensured her that it happens even to grown women when he knots them. Once he’d wiped her tears away his muzzle found hers and he kissed her deep as throb by throb he grew to full size in her nubile young body.
Once the kiss was broken, the Rottweiler looming over her began to move. Zoe was panting now, unsure if she’d climaxed just now while she was kissing her, or if this was one of the really big ones just building up. It was always hard to tell during a tie. Luke was thrusting again, but there was no movement inside her. There couldn’t be because she was wrapped too tight around him, his tip staying pressed against her cervix and his knot so big there was no hope of it coming out any time soon. He was moving her whole body back and forth, the blanked under them bunching up as the shallow tugs and thrusts made the hard mass in her rub enough to make the girl whimper like a feral bitch, with one intelligible word trying to break through.
“Fuck, Zoe…” the male above her growled, close to his own release.
“Daaaahhh… daahhhnnnhhhhHHhh! D-daaaaddy! DA-” the retriever pup whimpered up, her voice growing stronger and louder until it reached that shrieking range typical for pubescent girls and Luke was forced to muffle the pup with a kiss.
Zoe knew that she was supposed to stay relatively quiet, but if she’d been in control she never would have called Luke ‘daddy’ in the first place. But the pop’s eyes had gone blank and her body was convulsing under the Rottweiler still fucking it as much as their tie would allow. She was wrapped tight against him, enough to lift her back off the blanket and press her young tits hard against the older male’s barrel chest.
Lost as she was to the world, she felt it. There was really no way for her not to considering the tip now spraying virile canine cum was kissing her cervix, the stream of Luke’s seed rushing into her womb like it had so many times before, while she was on the pill. She could feel the first few sprays, from the moment they travelled up from the swollen base of Luke’s shaft to the moment the warm spunk erupted from the tip. After the first few it was just the gurgling sensation of swelling, of being filled with much more than her body can hold, but was being forced to hold by a very firm tie. She knew that if she were to reach down and slide a paw between them she could feel her normally soft and plump labia now hard as they stretched thin over Luke’s throbbing knot. 
Luke’s thrusts had died down until he was just grinding against her while he groaned, pushing her ass against the couch cushions while that heavy black sack twitched unseen, emptying everything the pent-up old dog had into the fertile bitch moaning under him. When the groaning and moaning stopped all the two could hear was breathing. Not the panting of feral dogs, but the deep, ragged breaths of two lovers trying to savor the moment and recover some of their strength. Luke was the first to manage, pushing his hands under her and gently pulling the whimpering Zoe up and into his lap as he sat down.
Luke held her against his chest as he leaned forward, making the knotted pup whimper a little as even the slight shifting caused the hard mass stuck inside her to shift against the post-coitally sensitive walls of her young cunny. She heard something crinkle and her own face crinkled at the familiar metallic click of a flip-top lighter opening, followed by a deep drag and a smoky exhale from the man still seeding her. This was the one thing she didn’t like about Luke, and to prove her point her nose scrunched up just before she sneezed from the lazily drifting smoke.
“I wish you wouldn’t…” the golden pup pouted, pushing away from the Rottweiler’s muscular chest just enough to stare him down.
“Just this one. Promise…” he said, running his free hand down her back as he laid his other arm across the top of the couch, keeping it as far away from Zoe’s scrunched up muzzle as he could. 
The girl believed him. He’d never broken a promise. He’d promised her she’d love taking his cock, and had been right. He’d promised her that doing what she did with Kirk would help them in the long run, and he was right about that too. He’d promised that if she wound up pregnant with his puppies, everything would be all right, which was why Zoe was now taking his seed into her fertile young body.
“How can I make you quit?” the golden girl asked, batting her eyelashes and running a finger down the line between the big dog’s firm pecs as she tried her budding feminine wiles on him.
“You might be doing it right now, sugar. Wouldn’t dream of smoking around a girl carrying my pups.” He said, letting his hand fall to her tush as he gave her a slow and gentle grope. “Tell you what, you bring me a positive pregnancy test, and you can be the one that throws my last pack in the trash…” he said, blowing smoke away from the pup in his lap but still getting a cough in response. “All right babygirl, let’s try something…” he said, making Zoe whimper a little as he raised his muscular legs and laid his feet on the coffee table.
His hand moved up her back until he had her by the scruff, gripping firmly as he pulled her down. Zoe’s eyelids fluttered and whines escaped her parted lips as every tine movement made her intensely aware of the cock still knotted and still lazily spurting inside her until she found herself stretched out with her back resting on Luke’s stretched legs.
“There we go. How’s the air down there?”
“Better…” Zoe admitted, as the smoke from his cigarettes now coiled way above her dainty nose. He did look good from down here, and she couldn’t miss the way he was staring at her body laid out before him. He laid his free hand down, a big beefy paw that almost covered her belly as he gave it a rub. He was pressing down just a little, gently but no doubt enough to feel the way he was making her bulge out.
“Guess I better get used to this tummy having a curve to it…” he said, smiling and making her aware once again of what was probably happening to her. 
The hand shifted a little, mussing up the soft, pale fur of her belly as his thumb settled on the tiny, sparse tuft covering her pubic mound. He pressed down a little, enough to make Zoe’s eyelids flutter, taking another drag before starting to move his thumb left and right. It was a little too high to reach her hood and the tiny pearl hidden inside it, but it was just above the knot still buried in her snug young pussy.
The swollen mass of canine flesh was throbbing inside her hard enough for her to take Luke’s pulse, parked right against the golden pup’s g-spot. It was intense enough just having it inside her without the Rottweiler’s thumb pressing down and rubbing the walls of her sex against his knot. Zoe was aware of her chest beginning to rise and fall sharply as she heaved out her breaths, her nipples growing stiff as Luke skillfully manipulated her nubile young body. He was still indulging his guilty (and in the pup’s opinion filthy) habit, but he didn’t take his eyes off her as he reached out and flicked his ashes into the ashtray he’d placed atop the back of the couch.
His eyes were on her, keen and hungry as his gaze traveled up and down her body. Up from the bulging teen cunny straining to hold him in, past the tummy that wasn’t hiding how much Rottweiler flesh and Rottweiler sperm her body was holding. Lingering on her nipples which were now two puffy pink peaks on her budding chest and settling on her blue eyes hidden behind long, thick lashes. She fought an urge to squirm as her sensitive cunny started to twitch and flutter around the cock it was straining just to hold. Squirming would tug on the knot and that was a very weird kind of pain, one that she liked in the heat of the moment but that made her wince after she and Luke were done.
“Just relax, babygirl…” Luke said, taking a final drag before putting his cigarette out and focusing all of his attention on her.
He kept resting his hand right there – the place their baby would grow if he really got her pregnant. His thumb was still busy a little lower and as he leaned forward he shifted enough to make Zoe wince. She calmed when she felt his other hand rest on her young bosom, ruffling the soft fur covering the firm bumps as his rough paw-pads slid across her nipples. He caught the right one between his thumb and index finger, playfully twisting it one way and then the other before giving it a slow tug until he drew a yip from the panting puppy.
The more he touched her the more aroused she got, and the more aroused she got the less she was bothered by the pain caused by her squirming while holding Luke’s knot. Her breath was coming out in shuddering gasps, her body growing tense as Luke played with her as if she were a living doll. He was talking to her, that deep rumbling voice that he used when they were together, telling her to relax, to let it happen. As if she could stop it.
Zoe’s big blue eyes scrunched shut and her floppy ears flicked back as her Waifish hips began to move, even though even the slightest movement was causing her smooth pink labia to distend around the knot they were holding. Luke was reading her body and pressed his thumb hard and rubbed even harder at just the right time, making the golden puppy yip as her nubile body convulsed, the jerking of her hips and contractions of her cunny serving to both tug and push Luke’s shrunken knot out. Even as she rode out her orgasm Zoe cringed at the sound of their tie breaking – an obscene noise as a little air and a lot of cum rushed past the loose seal her lips were forming around the smooth red length of Luke’s shaft.
“It’s okay sugar, let it all out…” Luke rumbled, not worried about the wetness she was spraying and leaking all over his lap. Kirk had once mounted her without remembering to put down a towel, and Zoe bitterly recalled him telling her to be careful not to make a mess, as if the mess she’d been holding was her doing. Luke didn’t care about a stain, he cared about her, which was why Zoe was reaching out with her arms, gesturing for him to help her up.
As the Rottweiler eased her back she felt his knot go back in as she sat on his lap, but it had shrunk enough for her to take it with nothing more than a soft gasp. Luke leaned back and she draped her young body over his, her hands resting on his shoulders as she rested her weight on the burly dog. She pressed her lips to his before she remembered he’d just had a smoke, but the taste wasn’t enough to make her pull away, or even to stop her from moaning as Luke pushed his tongue in and kissed her deep enough to make her not care about the flavor of his tongue. His hands moved to her hips, just holding her for a while. They were in no rush, they had plenty of time, but not a lot of patience. When she felt those hands grip her a little tighter and start lifting her off the Rottweiler’s cum-stained lap, Zoe rested her muzzle on his shoulder and moaned into Luke’s ear as he began to mate her again.
*******
“Zoe! Are you… did…” Kirk muttered. He’d fallen asleep on the couch and even though it was broad daylight it took the sound of the front door unlocking and closing to wake him up. He dreaded her answer even though he knew it. Zoe’s fur looked like she’d showered this morning, but the scent of a male… Luke’s scent… was still fresh on her. He’d taken her after she’d washed it off, just to make sure she’d come here reeking of what they spent two days doing. His golden girl just nodded.
“I’ll take a pregnancy test in a few weeks, then we’ll know for sure, but…” she trailed off and just shrugged, not bothered by her father’s grimace. Kirk felt bile rise in his throat at the thought that Luke had spent the weekend sodomizing his girl, but even the thought of Zoe whimpering as her ass was stretched open by a grown man was better than the vision he’d dreamed about - Luke knotted in his teen daughter’s fertile pussy.
“Zoe I…”
“I never liked what we did. You and I. I only did it because Luke said we couldn’t keep doing what we were doing until we made sure we were covered. I was never attracted to you. I think it’s not really… healthy for a daughter to want her father like that.” she said, basically saying out loud that she thought Kirk was sick for being so enthusiastic about her. “I did it so I could be with Luke. I thought about him and about the two of us together when I needed to get in the mood. Whenever we…” she began, but stopped short of saying the words that nevertheless hung heavy in the air. As she made her way to the stairs Kirk’s head dropped into his hands, whipping up when she addressed him half-way up to her room, without bothering to even turn around.
“When I was putting out… you always found time for me then, didn’t you?” she said before turning her back and going up to her room, and the casual way the accusation was delivered was what really left Kirk looking like he’d just been smacked across the muzzle.