Claire's Petshop

"Are you ready?" Penny said, as Toby tried yet again to break from her hold and mount Claire.

"Mhm..." Claire muttered. Not confident enough in her voice right now.

Penny let go.

Like a loosed arrow, the Vulpine hound jumped on top of her, his weight pressing down on her back as his paws hooked around her hips panting in her ear as he frantically thrust at her ass, trying to find her pussy. His love drops squirted onto her, the hot flashes against her skin making her shiver. Penny got down on her knees next to her and managed to grab hold of his growing length.

"Make sure to keep breathing." Penny said as she covered Claire's asshole with one hand to prevent any accidents as she guided Toby into her dripping wet heat with the other.

Claire let out a shout of surprise as his burning hot girth pierced her, the hound already pounding away with animalistic fury.

"You know, you've got a really nice voice even when you're screaming." Penny laughed, obviously enjoying watching Toby claim her as his bitch. It took Claire a moment to realise what she meant. Claire couldn't think as the hound pounded her soul out. The staccato thumps of his furry legs against her ass reverberating around the room as he claimed her pussy as his own. His knot was already inflating, making embarrassing noises as it squelched in and out of her dripping folds. Though it was hardly audible over Claire's screams of pleasure.

"MMMmmh... fuck, fuck, fuck...

OH FUCK

!" Claire screamed as Toby's knot doubled in size as the hound neared his climax, hot flashes of fluid splashed against her cervix from his love drops as he frantically pumped away. His knot was so big it was stretching her out as it pumped in and out of her. The sound of her pussy being ravaged by his knot almost audible over her screams of pleasure.

It hadn't been more than a minute and she was already close to cumming. The knot loudly slurping in and out of her as Toby stroked into her relentlessly. His length had grown, long enough now that when he bottomed out inside her his tip was beginning to hammer against her cervix. Claire moaned as his drops started to work their magic on her entrance, making anything to do with her cervix incredibly pleasurable, loosening her entrance to prepare her to be split open by his hard cock.

"He's almost there. You're doing great for your first time Claire. I know he's a little big, but this needs to be done." Penny said as she softly stroked her hair and rubbed her shoulder. Claire squirmed under her, desperately trying to hold still as her hips rocked against the cock ravaging her despite trying to hold them steady. Now that Toby was inside her, there wasn't much for Penny to do except comfort her and wait for him to finish.

Her legs shook harder as Toby doubled his pace, pounding away with fury. His knot really beginning to stretch her as it squelched with every stroke. With one final thrust, he howled as Toby hammered his knot inside of her for the last time, his knot rapidly growing to the size of a fist, filling her up as the bulge pressed through her walls against her pelvis. The two were sealed together until Toby was finished claiming her pussy.

His cock started to engorge, growing even longer inside her. She thought he was big before, but now she was completely filled in a way she never had before. The point at the tip of his cock was pressing insistently against her entrance, the pressure building as his thick rod swelled against her walls. Toby whined, the pressure building to a crescendo against her entrance as she felt her cervix begin to submit. The giant knot at her entrance giving his cock nowhere else to go but through her.

She moaned as her entrance finally yielded to him, his hard length spearing right through her as she was wrapped around his cock for a second time as he finally conquered her womb. Claire came, rolling her hips against him as her body shook violently, spearing him deeper as she was completely claimed by a beast for the second time today. A few inches of Toby's length slid deeper, making it past her entrance, his cock already pumping into her as it spurted rope after rope of cum deep inside her.

Her rippling walls massaging his cock milking more and more cum out of the hound. He was so big... She thought Nyx was big when it was breeding her, but Toby was something else. Her pussy couldn't even cum properly he was so big. Each contraction was forced to work its way around the giant knot sealing her entrance, as it milked its way up his shaft to where it pierced her womb.

There was no sign he was finished growing. He had to be almost a foot long now, his shaft spearing almost halfway into her gravid depths. Pulse after pulse of his cum pouring into her helpless pussy as his girth rhythmically swelled impossibly hard against her walls and cervix with every pump. She was panting and whining just as hard as the Vulpine hound knotting her as he painted her insides with his cum.

Claire came harder as his rock hard length forced its way deeper. The widest part of his cock kissing her entrance as it rolled on through her body, pressing impossibly tight where she was wrapped around him. The magic of his love drops making the sensation incredibly pleasurable as his still growing length slid deeper and deeper, getting wider and wider. Claire couldn't stop cumming as she was slowly split in half around even more of Toby as he used her womb as a cock ring, sliding ever deeper. She moaned as his knot grew even tighter inside her, solidifying his claim on her.

He was almost at his full length, half his cock in her pussy, the other half invading her womb as it slipped deeper with little resistance, stretching her out more than she thought possible. His cock was sort of an oval shape, and now her cervix was wrapped around the widest part of it. She took rapid halting breaths between moans and her cries of ecstasy as she felt herself stretch farther than would have been safe without the magical assistance of Toby's precum and the loving breeding from Nyx earlier in the day. Her breath hitched as the widest part of him finally forced its way through, splitting her open even more than Nyx.

Claire cried out, shivering as her orgasm grew even more intense from Toby hitching a leg over her hips, twisting around to put them butt to butt. The feeling of his knot stirring her insides as it flipped over was intense, his girth ground against her poor cervix as it rotated around inside her. Claire responded by cumming even harder on his cock, the convulsions of her pussy eagerly milking an even bigger load out of the hound as every contraction rippled up his length.

"Breathe, sweetheart. You're holding your breath."

Claire clawed at the pillow underneath her, her back arching, toes curling from the intensity of her climax. She took a desperate racking breath as she now realising that her lungs were burning for air. She was so consumed with pleasure she would have passed out from lack of oxygen if Penny hadn't reminded her. Strings of liquid dripped off her clit onto the floor--a mix of her own arousal and the small amount of cum that managed to escape. Her thighs and ass were soaked with their combined juices.

She remembered how Penny told her once that if you let a Vulpine hound cum inside you, you wouldn't stop cumming until they were finished. It was one thing to hear it; it was entirely different to experience it first hand.

"You're doing great, sweety. I'm glad you had me here to help you. If he had fucked your ass by accident you would have been in for a much different experience" Penny said with a smile, her voice soothing as she slowly stroking her hair. "You're cumming hard enough that you probably won't have to do this a second time. Even without the stone I can tell. For a first timer, you're doing a great job of milking a big load out of him. Most girls pass out before this point." Penny praised her with a soft squeeze of her shoulder.

Claire couldn't speak as her walls convulsed hard around the length claiming her. She was seeing stars from the intensity. Every pulse of cum pumped into her was forcing her to greater heights as his massive cock swelled and ground against her walls. His knot twitching against her G-spot with every rope of cum she milked out of him creating the most pleasant positive feedback loop from their combined orgasm. Her hips were moving on their own as she ground against him, trying to force him even deeper despite her pussy swallowing all of him.

She would have collapsed on the floor if it weren't for the wedge shaped pillow that was supporting her weight. Though, even without it, the hound wouldn't have let her pussy go. She would have just hung off Toby's cock by his fist sized knot, the hound still in full control of her body. Toby backed up, thrusting deeper into her and sending a shock of pleasure through her body. Another squirt of hound cum slipped past the giant knot, dripping between her folds to join the string of cum and her own girl drool dripping between her legs forming a puddle on the floor.

Claire had been cumming for about 5 minutes at this point, and she could feel the heat inside her from the half litre of Vulpine cum painting her insides. Most of Toby's forearm sized cock was spearing into her womb. He was just too big for her pussy to take all of it. Thank the Gods for those love drops.

After what felt like hours, but was probably only another 5-10 minutes, the massive cock spearing her went still. Toby was finished pumping his load and now she had to wait for his knot to dissolve inside her. It would be 15 to 30 minutes before that happened, so she would be stuck here butt to butt with Toby.

As Claire came down from her orgasm, gasping for breath, Penny took out a white crystal about the size of her thumb and pressed it against Claire's belly. It glowed a soft blue against her stomach as Penny hummed her approval.

"With the amount you milked out of him, there's no way any of those eggs will make intact wyrms when they hatch. In fact, you probably sucked a little more out of him than you should have." Penny chuckled as she continued to stroke Claire's hair.

Claire moaned in response, still not able to form words as her boneless body melted into a puddle, still connected through her sex to the Vulpine Hound. The aftershocks of her orgasm still crashing through her body almost caressing Toby's length, thanking it for the load and for making her cum so hard.

"You did great, hun. I'm so proud of you! You've got your first legal batch of brood! You're a real pet shop owner now."

Vulpine hounds were loyal pets, and many kept them the same way you would keep a normal dog. Yet they were special for one important reason: intact Vulpine hounds produced semen that was a potent sterilising agent for other species.

Now that Toby was finished with her pussy, it meant her clutch of Broodwyrm would be permanently incapable of producing their own intact eggs when they reached adulthood and bred someone. Their eggs would just dissolve inside the body of their partner after a few days, converted into mana for their body to absorb. Most mages kept a neutered wyrm for that reason alone (besides the obvious fun, of course.)

Broodwyrms needed to be sterilised because of the risk of an outbreak from a clutch of hundreds of sexually violent wyrms forcibly claiming women. Since there was a 10:1 ratio of women to men from the effects of mana on reproduction on humanoids, just one intact Broodwyrm could cause a panic as the infestation ripped through a city.

A woman might breed with a wyrm and not realise it was intact until it was too late and juvenile wyrms were already pouring out of her. They were similar to snakes being ambush predators, escape artists, and adept at camouflage. They could lay their first batch of eggs after only a few days, and could also reproduce without even needing to mate. It had been decades since a wyrm outbreak, and Claire still heard stories from some of her customers who were taken by them.

It was illegal to keep or sell an intact Broodwyrm without a valid breeding license, which Claire and Penny had at the shop. This meant that Claire legally had to have her brood sterilised. And the easiest, cheapest, and most fun way was with a Vulpine Hound like Toby. Thankfully his cum wouldn't have any effect on her own fertility since it only affected whatever was in her womb.