Rhianon, the shyer one of the two Isthar sisters reajusted the latex of her suit as she eyed her athletic ass in the mirror. The white complimented her beige fur nicely but she herself was convinced it looked better on her sister. "Epona, what do you think?" "What do I think? I'm at a loss of words, you look stunning!" "Y-you really think so?" Rhianon asked with a shaky voice. She let out a soft whinny as Epona's fingers lingered just a little too long on her rear, the latex squeaking under her sister's playful grasp. "S-stop that," she murmured, though the flick of her tail betrayed her enjoyment. "Know so" Epona answered, giving her a playful grope. They were close and practically always together, especially when they where doing naughty things. With Epona being a bit more forward and flirtatious, Rhianon was more reserved and shy until she comes out of her shell. They both have a dominant streak but Epona is always the first to act, sometimes even on her sister, whom she adores to use like her little plaything during ponyplay. Today, though, they'd be using someone else as their toy. It's their second week on the job, and today's subject would prove to be quite interesting. She's currently heavily pregnant and her multiple breast are engorged with freely dripping milk, considering her current state SLUT.CO found it important to provide her with fresh protein daily and has tasked M.A.R.E. to provide those to the pregnant woman. Epona opened her holopad; Name: Laura Gender: Female Species: Canine, Shiba Inu/Cocker Spaniel, Mutt Age: 24 Status: 8 months pregnant with pups, note: Pups are from multiple sperm 'donors' named Taq & Kaizer. Epona smirked and tapped her holopad again, bringing up the subject's vitals. Laura's heart rate was elevated, her hormone levels spiking in predictable waves. "Mmm, she's already squirmy today. Probably desperate for relief." She swiped to the next screen, displaying the feeding schedule. "Protein delivery in T-minus three minutes. You wanna prep the milking rig or should I?" Rhianon's thighs clenched together as she nervously spoke up; "A-actually..I had a different idea for today..i-if you'd like to hear it?" "All ears" Epona replied, knowing her sister could come up with the most devious plans when allowed to express her creativity as a domme. "I was thinking.. w-what i-if we feed her ourselves? F-from the tap if you will, she always sucks at the feeding tube with such eagerness it would probably suck the cum out before we climax. "At least she'll try, that's for sure" Epona replied with a smirk, the idea tickling her brain and loins with renewed anticipation of todays activitys. Her smirk deepened into a grin as she swiped the holopad shut with a flick of her wrist. "Oh, I like where your head’s at, Rhia," she purred, stepping closer until her breath ghosted over her sister’s twitching ear. "Let’s see if our little mutt can handle the real source." Rhianon’s tail flicked again, this time with purpose, as she reached for the control panel beside the mirror. With a press of her thumb, the wall hissed open, revealing the observation window into Laura’s chamber. She could be seen splayed on the bed and strapped into her harness, granted slightly more wiggle room due to her condition; she was already drooling from the corner of her mouth like a dog during the Pavlov effect. "Let's go see our girl~" The pressurised door opened with a hiss, allowing them to step inside, immidiatly Laura's head turned to the noise, her tail wagging with excitement. The tail thumped against the padded restraints as the Ishtar sisters stepped into the room, their polished hooves clicking against the sterile floor. The scent of warm milk and pheromones hung thick in the air, making Rhianon’s nostrils flare. Epona strode forward first, her hips swaying with deliberate dominance as she trailed a gloved finger along the swollen curve of Laura’s belly. "Mmm, look-at-you~! Already leaking before we even start.." Epona cooed, her thumb brushing over one of Laura’s engorged nipples, smearing a bead of milk across the taut skin, flicking it up and taking a sample to her lips. Rhianon meanwhile took her position at the head of the table, Laura already glancing up at the ceiling with excitement to see the apparatus come down.. but it didn't.. Laura’s ears twitched in confusion as the mechanical feeder remained still, its usual whirring absent. Instead, Rhianon’s fingers traced the edge of her jaw, tilting her head up until their eyes met. "W-We've a special feeding tube for you today~" Rhianon’s fingers trembled slightly as she guided Laura’s gaze downward, where Epona had already unhooked the front of her own latex suit, the material peeling away with a sticky snap to reveal a fat, thickening horsecock. Rhianon did the same, freeing her own monstrous piece of meat that slapped Laura on the face. Laura’s breath hitched as the warm, heavy weight of Rhianon’s cock smothered her muzzle, the musky scent flooding her nostrils. A whimper escaped her throat, part shock as her tongue flicked out to taste the salt-slick pre already beading at the tip. Above her, Rhianon let out a shuddering whinny, her hips twitching forward to smear more of her arousal across the canine’s trembling lips. Epona chuckled darkly, her own thick length bobbing against Laura’s swollen belly as she leaned down to whisper, "That’s it, mutt. Let's work for your protein shake~" Laura’s tongue flicked out instinctively, lapping at the slick pre already dripping from Rhianon’s tip. The shy sister let out a breathy whinny, her thighs trembling as the warm, wet pressure of the canine’s eager mouth sent shivers up her spine. Epona smirked, positioning herself just above Laura’s parted lips, her cockhead glistening as it nudged against the swollen teats below. She shifted her hips back till the tip was prodding at her lips which instinctively opened as an invitation. Epona didn't waste time as the buzzer for her feeding went off and smoothly shoved the first half of her cock down Lau's oesophagus, allowing the medial ring to kiss her lips. She stayed there for at least ten seconds.. twenty.. only to withdraw when she loudly counted up to thirty before withdrawing, but only slightly so Lau could cough around the intrusion, her maw already slick with slime when Epona sheathed herself back inside. Laura’s throat convulsed around Epona’s girth, her muffled whines vibrating against the thick shaft as drool pooled beneath her twitching muzzle. Rhianon bit her lip, watching her sister’s hips roll in slow, deliberate thrusts with each one stretching Laura’s jaw wider, her canid fangs scraping faint marks into the latex-clad thighs bracketing her head. A thin trail of milk leaked from Laura’s neglected nipples, dripping onto the swell of her belly where Rhianon’s cock now rested, smearing pre-cum into the sticky mess. Rhianon devoted her attention to those aching nipples, her fingers kneading them gently till they all beaded with fresh milk before finally lapping them up one by one with the pased slowness of Epona's cock. Rhianon’s tongue swirled around Laura’s left nipple, teasing the stiff peak before suckling deeply, drawing out a thick stream of milk that spilled over her lips. Laura’s whines pitched higher as Epona’s cock pulsed in her throat, the medial ring stretching her gullet with every three-quarter thrust. Epona’s fingers tangled in Laura’s fur, gripping tight as she forced her deeper, the canine’s muzzle pressing flush against her pelvis. A wet, guttural gag rippled through Laura’s chest, her throat fluttering wildly around the intrusion as the tip flared partially distending her throat visibly. Epona’s hips faltered as Laura’s throat began to contract, her jaws slackening to allow a thick, viscous drool to web between Epona’s thighs. Rhianon pulled back from Laura’s nipple with a wet pop, her eyes widening as the milk now flowed in thick, creamy streams tinged with a hint of blue to signify the first fresh milk of the day. Epona withdrew her slick cock from Laura's lips, which gave a protestful whimper. She paced around the table and stood at the opposing side of Rhianon as if to say: Your turn. As she flopped her erection down onto the mess spilling from those aching teats, she pistoned her hips back and forth, using her hands to squeeze her cock between two teats wich started leaking more profusely, the cream frothing with the salivated mess on Epona's cock. This taking enough time for Rhianon to insert herself into the awaiting throat. Epona's smirk sharpened as Laura's whimper dissolved into a shuddering gasp around Rhianon's cock. "None of that," she chided, pinching Laura's nostrils shut with one hand while the other guided her sister's hips forward, forcing the medial ring past Laura's uvula. The canine's throat bulged, her muzzle twitching as Rhianon's tip kissed the convulsing entrance to Laura's stomach. Rhianon's cock was bigger than her sisters and it showed on the outline of Lau's throat. As Rhianon's hips snapped forward, a mixture of pre-cum and drool dripped onto Laura's swollen teats, now bouncing with each choked gag. Epona leaned down, her breath hot against Laura's ear. "Count. Out loud." She released Laura's nose just long enough for a wheezing inhale before sealing it again. Laura's voice strangled as she counted around the cock in her mouth, "F-fv—Siiigs! Svhn!". Her body arched, her claws scraping futilely at the table as milk sprayed from her nipples. Rhianon's breath hitched, her thighs trembling. "She's.. ah~contracting," she stammered, her cock twitching inside Laura's spasming gullet. Epona's laughter was low and husky. "Then nourish her." She clamped her palm over Laura's muzzle, ensuring not a drop would escape. Rhianon's hips stuttered once, twice before hilted herself. Her release flooded Laura's throat in thick, salty waves. Laura's eyes rolled back, her hips jerking against the restraints as her own climax ripped through her in a silent, suffocating, and utterly owned way. Epona's grip on Laura's muzzle intensified as Rhianon's cock pulsed, releasing a torrent of cum that distended Laura's belly beneath the latex straps. Laura's gag reflex erupted in a frantic bid for air, but Epona's thumb sealed her nostrils shut, rendering her mute. "Swallow," she whispered, her eyes gleaming with excitement as tears welled up in Laura's bulging eyes. Rhianon's voice cracked as Laura's throat constricted, her hips stuttering wildly. "She's... sss..sucking me—" The words dissolved into a strangled moan as Laura's esophagus clamped down, extracting every last drop with determined efficiency. A sudden jet of milk burst from Laura's left nipple, splattering Rhianon's chin. Another landing squarely on Epona's cock, which continued to grind between Laura's swollen teats. Epona's laughter was low and husky, her eyes glinting with amusement. "Oh, mutt... This isn't part of the plan." She released Laura's nose for a fleeting instant, allowing a wet, wheezing gasp before slamming her palm back down. "But let's see how far you can be pushed." After finally getting the que from her sister Rhianon withdrew her shrinking cock from Lau's muzzle and the sisters swapped places once more. Rhianons cockhead was flared and ready to ruin Lau's throat. Rhianon's cockhead nudged past Laura's lips, the flare stretching her muzzle wider. Epona's fingers knotted in Laura's mane, yanking her head back to expose the trembling gullet beneath. "Count properly this time," Epona purred, her thumb sealing Laura's nostrils shut again. Rhianon's hips rolled forward, her shaft gliding deeper until Laura's throat bulged around the medial ring. The first droplets of pre-cum landed in laura's throat, triggering a gag reflex that Epona's grip held at bay. "One," Epona prompted, a sly grin spreading across her face as Laura's strangled "Fhmm!" vibrated around Rhianon's cock. Rhianon bottomed out, her pelvis grinding against Laura's muzzle, a fresh jet of milk erupted from Laura's nipples. The canine's claws scraped the table, her hips jerking against the restraints. Epona leaned down, her breath hot against Laura's ear. "You're so desperate for this, aren't you?" Her free hand pinched Laura's right teat, twisting till another jet of milk splattered Rhianon's thighs. Rhianon whimpered, her resolve fraying as Laura's throat convulsed. "E-Epona..she's squeezing—" "Then use her," Epona snarled, slamming Rhianon's hips forward. Tears spilled down Laura's cheeks as her airway collapsed, her vision speckling with black. Rhianon's cock twitched, pulsing in time with Laura's frantic heartbeat until, with a shudder, Rhianon surrendered to the heat, flooding Laura's stomach with a torrent of cum. At the same time, the deepthroated slut achieved her own full body climax, achieving a massive squirt between her legs, spraying all across the floor of the operating room, one the interns would have to clean up later no doubt. As Laura's body arched, Epona finally released her nose. The canine gasped, drool and cum spilling from her lips as Rhianon withdrew. "Good girl," Epona crooned, swiping a finger through the mess and pressing it against Laura's tongue. A low, husky laugh rumbled in her throat as she gazed at Laura's milk-slicked teats. "You're going to make a perfect little milkmaid."