Frost
Story by DarnMutt on SoFurry
Approximately 3000 words. Originally uploaded to FA in 2017.
“Good girl. Hop up on the table, now.”
Frost crawled to the autopsy table on her hands and knees. She looked up at Master, eyebrows drawn together, and then at the table Master had hidden in this basement. She knew Master wasn’t interested in vivisection, but she never enjoyed the sensation of frigid steel on her back.
“Come on. Be a good girl.”
She gnawed on the ball gag in her mouth, then did as instructed. The leopard rose onto her feet and then climbed onto the table, where she then sat back on her heels.
“Good girl.” Master scratched her under the chin and she smiled as best she could and purred. “We’re taking your training up a notch today, so I hope you’re ready.”
Frost wasn’t ready for this and never would be.
“On your back like my good girl. Legs up and apart.”
Frost assumed the instructed position and lay flat on her back. Her feet were planted on the outer edges of the table; her legs, bent at the knee and apart from each other to give Master a good view of what lay between them.
“Good girl,” Master praised; she shivered. “I’ll be gentle today, pet. I want you to enjoy this as much as I’m going to.”
He wiggled the base of the buttplug lodged in his pet’s urethra and she trembled. The head of the plug, which nudged the entrance to her bladder, was as wide as two of Master’s fingers. It had taken her two weeks to work up to that size, but despite how slow she was to stretch, she knew Master wanted to fuck her—now.
“Let’s take this out and see how stretched you are.” The doberman reached onto the surgical table next to him and snapped on a pair of gloves. “I know my good girl’s been holding it in all night, hasn’t she?”
Frost closed her eyes and nodded. She had to pee and didn’t know when, or if, Master would let her.
“Perfect.” He leaned in and nuzzled her clit. At the same time, he took the base of the buttplug between his index finger and thumb and eased it out.
She started to pant, not just because of Master’s warm breath on her clit, but because of the buttplug stretching her urethral opening until it finally hit the tapered end and slid out. A few drops of urine dripped out of her, and she winced because of it.
“It’s okay, Frostie. You’re okay. Hold on for a little longer.”
Frost was glad Master wasn’t mad at her for losing control for a half second, though she wasn’t sure she could keep him proud. She didn’t know how well she’d be able to hold on once he started putting bigger and bigger things inside her tightest hole.
“Relax, pet. This one’s only a little bigger.”
Frost glanced down her body and saw a glint of light off the steel dildo Master had. She tilted her head back and closed her eyes, because she was scared. She’d never had a dildo inside her urethra and wondered how it would feel to have it stretched so wide so evenly. Hopefully it was good. Master had yet to hurt her in that way, and she hoped that was how things stayed.
“Relax now, pet.”
She swallowed. The ball gag prevented her from getting everything in her mouth down.
Master nudged the tip of the lubed dildo against Frost’s urethral opening, and she tried and succeeded in remaining still. The metal was cooler even than that of the table she rested on, so maybe that was why, when the first few centimeters slid into her, it hurt more than she expected.
Frost clenched her teeth around the ball gag and whimpered.
“Shh, Frostie. I promise it’ll stop hurting soon.”
Master nudged the dildo forward and more and more of it slid into Frost until the head of it nudged the entrance to her bladder. She tensed.
“It’s just like anal after this point, Frostie. Relax. Bear down a little and it’ll make it easier.”
She tried to bear down as if she were peeing, but it was easier said than done when there was metal pressed against her bladder’s opening. Regardless of whether or not she was ready, Master nudged the dildo forward again. With what felt like a pop, it slid into her.
Frost flinched and let out a sharp yowl. The dildo stretched an opening the size of a pin into one five centimeters across. It stung worse than the after effects of a flogger on her ass, but perhaps that was because she wasn’t used to this kind of pain.
“Shh. You’re doing great so far, girl. It’s all the way in your bladder now. Doesn’t it feel a little better?”
Master was right in that after the dildo got past the tight space sealing off her bladder, the sting faded into something duller and easier to ignore. She nodded, and as a reward, Master rubbed her clit with his thumb. Though Frost was reluctant to feel pleasure in that scenario, her pussy shivered.
“Good girl. Stay relaxed, okay? I want this to be good for you.”
Master started to thrust the dildo into her at a measured pace. Every pull and push made the entrance to her bladder sting—and more so when Master twisted the dildo—but she bit down on her gag and tried to bear it for Master. Frost had known for some time he was into this, and had consented recently to please him. She hoped this pleased him.
“There we go. Good girl. Very, very good.”
The sting faded. Rather than focus on her stretched bladder entrance, Frost focused on the sensation in her urethra. Her body was more pliant there. She focused hard and pretended her urethra was her pussy, and for her effort, her pussy twitched. Frost was getting wet and she didn’t know if she wanted to be or not.
“Very good.”
Master flicked a switch on the base of the dildo that kicked up a low vibration. Frost arched her back and a whimper escaped past her ball gag.
“Shh. Back down, girl.”
It took concentration for Frost to do as asked, but she managed. The vibration went straight to her clit, even more so when Master tilted the head of the dildo downward and pressed the base of it against the snow leopard’s clit. In what felt like an instant, she was dripping wet and the entrance to her bladder was twitching around the dildo inside it.
And then she came. The orgasm came out of nowhere and slammed into Frost like a tidal wave. It knocked the wind out of her and swept her up in a rush of pleasure. The entrance to her bladder spasmed around the dildo stretching it, and somehow, the sensation of her body fighting against it made the pleasure sweet to the point of saccharine.
It felt like ages before Frost came down from the high. She panted through her nose and wanted to apologize for coming without permission, but the ball gag wouldn’t let her. Instead, she glanced down the length of her body at Master and gave him an apologetic look. She didn’t know how convincing it was, though, because the dildo was still vibrating inside her and making her tremble.
Master smirked and Frost knew he wasn’t mad. “Very, very good girl. I think that was the fastest you’ve ever come.”
She was sure it was. She didn’t know why the stretch of her urethra made the wave of pleasure hit so hard, but she wasn’t going to complain. Maybe she would enjoy this as much as Master.
Master gave one last thrust of the dildo into Frost, who moaned and let her head fall back to the table. The doberman switched off the toy and pulled it from inside his pet.
Frost tensed too late. A short stream of urine leaked past the loose entrance to her bladder before she was able to tighten again.
“It’s okay, pet. I know you’ve been holding it all night, so it’s fine. I also thought it might be more fun for you if your bladder was nice and full.”
Why Master thought that, she didn’t know. Her bladder was so full it showed as a bulge in her lower belly. She thought she could hardly fit more urine in it, let alone Master’s cock and perhaps even his knot if he were rough enough.
“We’re going another size up, pet. Just like last time, try to bear down.”
It was easier the second time, though next metal dildo was a half centimeter thicker than the last. It stretched with the anticipated sting, but Frost was able to bear down and made the passage of the dildo’s head into her bladder smoother. She shivered when her body clenched around it.
“Good girl. Good girl.”
Master did as he had last time, though he pushed the dildo deeper this round. He pressed the base of it against Frost’s clit and the head of it he tilted downward until it pressed into the back wall of his pet’s overextended bladder.
She came again when Master started to thrust the dildo into her. The stretching and the sensation of the metal against her bladder wall—someplace she’d never been touched and thought she never would be touched—was too much and she didn’t know why. She came down from the high quicker that time, and once she had, Master slid the dildo out of her and a few drops of urine escaped.
Then came a third dildo. A fourth. A fifth. Frost wasn’t sure when things had stopped stinging, but knew she was lost in pleasure by the third dildo. Master had started to rub her clit then, and she had lost track of time in the pleasure and devolved into a drooling, mewling mess.
When the fifth dildo came out, she whimpered at the loss and swished her tail.
“You’re ready, pet,” Master said; she felt the throbbing opening to her bladder tremble in anticipation of yet another stretch. “Just let me get ready so we can make sure everything’s as clean as possible.”
Frost let her head loll to the side and watched Master through glassed eyes. His cock was unsheathed and dripping; she wondered when he’d gotten to that state. The doberman washed his cock up with antibacterial soap, rinsed it, pulled on a new pair of latex gloves, and then slicked his cock with surgical lube. Frost shuddered and another few drops of urine slipped free.
By the time Master got between her legs, he was panting. “My good girl looks so ready for me. She’s ready to take my cock in her peehole, isn’t she?”
Frost looked at him down the length of her body, nodded, and mewled.
“What a good, good girl—my precious kitty.” He grabbed her legs by the underside of her thighs and pulled her toward him until her ass was at the edge of the table. The untouched area was cool. “Relax, now. Let’s enjoy your last first time.”
A surge of pleasure trembled in Frost’s lower body. Master was taking her urethral virginity, just as he had taken her vaginal, anal, and oral. The fact that she had given and was giving everything to Master made her pussy wetter than it had been, which was a feat of nature.
Master took his cock by the base and Frost wrapped her legs around his waist. The doberman nudged her urethral opening with the tapered head of his cock and Frost mewled. She wanted him to hurry. She wasn’t allowed to grind forward into him, but instead had to wait until he decided he wanted to pleasure her.
“My good girl hasn’t forgotten her manners.” Master was on the edge. Frost could see his composure crumbling, which aroused her impossibly more. “Good girl. Let’s make sure you get a lot of pleasure for being so well-behaved your first time.”
Master prodded her urethra with the head of his cock, then pressed it in. With slow, short thrusts, he slid more and more of his cock into her until the head broke the seal to her bladder with that intense pop and her body shivered around him. Master didn’t stop until the base of his knot was snug against her clit and pussy.
Frost mewled, but resisted the urge to thrust against Master. He would give it to her soon enough, exactly how she liked it. Soon enough. Soon enough. Soon enou—
Master withdrew until his cockhead popped out of her bladder—she whimpered at the loss—and then pressed forward and broke the seal again.
He gave it to her. Dear god, did he give it to her. He gave her his cock harder than he’d given her the dildo, and the rough friction against the opening to her bladder made her break down into something primal. There was only the pleasure, Master’s panting above her, his hands gripping her thighs, and his knot repeatedly pressing and rubbing against her clit and her soaked pussy. She mewled and squirmed against him, and he continued to fuck her until he was pounding her urethra, punching and breaching the entrance to her bladder over and over until all she could do was let herself relax and become worn out under the assault.
“Good—good girl, Frostie,” Master praised. By his tone of voice, she knew he was close. “What a good girl you’ve been. What a—do you think you can take my knot?”
Frost wasn’t sure she could, but she wanted to. The thought of being stretched farther than she ever had been in a single burst made her stomach clench. She nodded her head aggressively and tightened her legs around Master’s waist.
“Good girl, Frostie. Good girl.”
That was the last thing he said before he plunged his knot into her urethra, then past the opening to her bladder. The pop was more intense than it ever had been. There was hardly more of Master’s cock past his knot, so it pulled back against her bladder’s opening in a type of unexperienced pleasure that made her entire bladder spasm. Were his knot not plugging her completely, she knew she would have lost control and urinated all over him.
Frost felt Master cum inside her at the same time he dropped his hand to her pussy and rubbed her clit. The burst of hot cum inside her bladder, Master’s cock throbbing inside her, and the pad of his thumb abusing her clit made her lose any composure she may have had. Frost came the hardest she’d ever come. She spasmed, trembled, and mewled in Master’s embrace, and knew she would have squirted if she weren’t stopped up by the thick dog knot she’d come to love. Being plugged by him so completely made her body spasm again, throwing her into another orgasm before the previous one had finished.
She must have blacked out. When she came to herself, Master’s knot was still lodged inside her, but he was bent over her now, head rested on her bare breasts, panting against her. His tail was wagging and Frost couldn’t help but exhale a laugh. Strong as he was, sometimes Master was so cute.
“Mmm. Am I that funny?” he asked through a panted laugh. “God, Frostie—you’re incredible. You’re so perfect.”
She wanted to tell him that he was perfect, too, but the ball gag she continued to drool around was preventing her.
“I love you, Frostie. You’re such a good girl.” Master stroked her side with one hand. “Good girl, Frostie. I love you.”
Frost purred deep and knew the noise rumbled against Master’s chest. She loved the sessions, but this was perhaps her favorite part—the end, when Master told her she was special and that he loved her. The part of the scene where all the pleasure that had culminated settled down into something giddy while Master’s cock soaked inside her and filled her up with cum.
Master hummed and laid his full weight against Frost’s torso. She flinched at the pressure applied to her bulging bladder and was assaulted with the intense urge to pee. Her urethra shuddered, but Master’s knot prevented anything from leaking.
“You really want to go, hmm?” Master sat up and rubbed the hand not caressing her side over the bulge of her bladder. She’d been full to bursting already, and his cum had made that worse. “I’m almost ready to pull out, pet. Once I’m out, you can let go. Just let everything go.”
Frost nodded.
She had to withstand the fullness for several more minutes until Master pulled out of her with one last, intoxicating pop.
Frost couldn’t have held back if she wanted to. Master stepped to the side as soon as he pulled out and Frost lost control. A mixture of her urine and Master’s cum arced out of her urethra and splattered on the basement’s concrete floor. The sensation of the mixture passing her bladder’s abused entrance drew one last, feeble orgasm from her, which lasted until the arc of urine faded and the last few drops dripped down her pussy.
“Good girl.” Master was beside her, petting her head. “That was good, wasn’t it?”
She purred past the ball gag and swished her tail. It had been incredible—more intense than she ever could have imagined. Master knew every way to play her body and had since the first day they’d met. Every day she got to spend with him was a bliss she’d never before known.
“We’re going to do this again next week, Frostie. My beautiful girl.”
Frost purred so loud it hurt her throat. She couldn’t wait.