Duke's cock thickened even more and his knot swelled. He drove his thick shaft into her, using long, deep, strokes. The lump at the base of his cock stretched Claire's hole wider and wider with every pump of his young, experienced, prostate. Soon the lump was causing her some discomfort; and just when his thrusts had started to feel good! It slid in and out of her, until her sphincter loosened just a little bit more.
Her ass was alive with sensations. Her body tried to adjust with each thrust, and she grew to love the expanding knot stretching her more and more. It grew bigger and bigger. Soon, she had to grit her teeth and grimace. Her bung-hole felt like it was being bruised and then she was afraid his knot would tear her open. She couldn't take any more.
"Ow! Ow! Ow!" Claire grunted, until finally, Duke's knot forced its way inside one final time and locked into place.
Claire expelled the air in her lungs and felt the fullness of a long, thick, dog-cock and its huge knot, filling her bowels.
"Whew!" Claire exclaimed. Now that the hard lump had stopped slamming in and out of her sphincter, she could enjoy the feeling of being ass-fucked once again. She was ready to start rubbing her pussy. She wanted to cum with Duke's long, fat, cock wedged in her ass. It was an odd feeling. She felt stuffed and full. It felt good!
Duke continued to hump her, but his cock didn't have much room to move. It was lodged deep inside of her, and there was no way her tight hole would let it escape for a long, long, time. It was enough though, his cock swelled and lurched. His knot grew and grew. After he was sure they were tied, he began spurting dog-cum into Claire's pussy, making little humping motions and driving his thick cock as deep as he could..
"Oh my god!" Claire said aloud. She had forgotten how large his knot could grow. She mentally compared it to how small her bowels must be. It felt like a balloon expanding even wider inside of her. The pressure grew and grew. She felt dizzy. She loved it! Claire plunged her hand into her pussy and began to work her fingers into her dripping snatch. She rubbed her little nub in fast little circles. She began to cum. She was coming with her precious dog. With his cock in her ass and her fingers in her pussy. She could feel his cock through the thin membrane separating her cunt from her lower-intestines.
Her orgasm rocked her. Duke yelped as she squeezed his cock with her sphincter muscles. Claire grunted and moaned and came like never before. Her ass was on fire. Her pussy was exploding. Stars filled her vision.
"Ah! Ah! Ah!" Claire groaned.
"Nnnnn-nnnghhh!" she grunted.
"Fuck! Fuck! Fuck! Uuu-uuu-uuc!" she yelled.
She never heard the foot-steps running down the hall.
"Claire! Claire! Are you alright?" It was her father's urgent voice. His little girl was in trouble!
Suddenly, the door flew open and Claire's bedroom was flooded with light.
Her father stood at the opened door. He stared at his little princess. He met Duke's eyes. He noticed his happy expression, exhausted body, and hanging tongue.
He looked at Claire. She was still orgasming. It was clear; the two of them, both dog and daughter, were willing participants.
"Oh, daddy!" Claire sobbed with embarrassment. "Don't look at me!"
Her body convulsed as she continued to cum. She rubbed her pussy and ground her hips against Duke's furry body, wringing out the last waves of her terrific orgasm. She looked up at her father and saw the lust in his eyes. The humiliation washed over her. She came again.
"Ngghhh! I'm cuming! I'm still cuming!" she cried. "Oh, daddy! I'm just a slut! I'm just a slut for dog-cock!" Her embarrassment triggered more electricity to tingle up and down her thighs, her pussy, and her stuffed-full-of-dog-cock ass.
Claire had always known she would get caught some day. Those thoughts had filled her mind whenever she played with Duke; stroking him, sucking him, and eventually fucking him in the privacy of her bedroom. She had imagined her father opening the door and finding her having sex with Duke. Seeing his shocked, horrified and eventually lust-filled expression. It always made her cum even harder.
Claire recalled the excitement and humiliation of almost being caught at the public park, and then the incident with the family at the park shelter. She wondered if she had been trying to get caught, or just thrilled at the thought of someone finding her stroking, sucking or fucking a dog?
As the tingles left her body, she flicked her hair back and locked eyes with her father. Neither looked away until her daddy reached down to adjust his swelling cock. Now, he was the one ashamed. His cock was swelling as he lusted after his slutty daughter. "Fucking a dog? She was fucking dogs?"
He looked at her firm, teenage, breasts hanging plump and full beneath her chest. He admired her soft shoulders, the curve of her back, and the roundness of her hips and ass.
His daughter looked at him and then looked at his thick cock imprisoned in his trousers. Her father was horny. She made him horny. She licked her lips.
"Come here," Claire whispered. "Take it out."
He looked at her. His cock lurched. She was so sexy. She was so slutty. She was so much like her mother.
"I want to see it, daddy."
Doug Davis took a step forward. Then another. Both Duke and Claire watched him intently. He finally stood close to her bed.
Claire reached over and felt his thick cock through his pants. It was long and thick. "Oh, daddy…," she sighed. "I want it. I want it in my mouth."
Claire began to fumble with his zipper. Her father reached down to help. Their hands met and clasped together. He pulled down his zipper and grabbed his straining cock, struggling and tugging it out of its tight confines. He thrust his hard cock forward. The light shone off his taut cock-head. He pumped it proudly. His cock throbbed and bounced before Claire's eyes. She opened her mouth and licked her lips.
Claire recalled her failed date with Tony. He had wanted her to suck his cock, but she felt it wasn't proper to suck cock on a first date. She made him settle for a hand-job. She always regretted not taking his hard cock into her mouth; now, she had another chance.
She leaned forward; her open mouth making clear her intentions. Her father was too aroused to refuse. He moved another couple of steps forward, leaving his pants on the floor behind him. He felt her warm mouth engulf his shaft.
"Mmmm-mmm," Claire moaned. She felt so naughty! A dog-cock stuffed in her ass, and her daddy's cock in her mouth. She began to bob her head on his shaft. It was so different from a dog's cock. Round instead of pointed. Dry instead of wet. Oozing pre-cum instead of squirting it. It was nice. Different, but nice.
Doug felt his little girl's lips wrapped around his cock. He slowly thrust into her, rocking his body back and forth. His daughter sucked him with more urgency and he felt his cock swell. She was good at sucking cock. He wondered if she learned this from boys at school, or from Duke and the dogs at Mrs. Hill's Kennels. Just thinking about his little princess sucking and fucking dog-cock made his balls tingle.
"Duke's cock is in my ass, daddy," Claire told him, before taking his rock-hard throbbing cock back into her mouth.
"Un Ggghhhh!" Doug grunted. He began to spurt! Cum splashed on Claire's tongue. He pulled his cock from his daughter's hungry mouth, wanting to spray her slutty face. His thick cum blasted up from his shaft and landed across Claire's cheek and nose. Pressing his cock against her face as he jerked, he painted her with more cum. It surged from his cock squirted up and over her right eye. He saw Claire's opened, yearning mouth and placed his thick cock-head at its entrance. He dumped three loads directly into her mouth, with one stray strand erupting over her upper lip. He emptied himself inside her before rubbing his oozing cock all over her face.
"Fucking cock-sucking, dog-slut," he uttered. His daughter was a slut. Just like his wife. He slapped his softening cock against her face. He was angry. He was ashamed. He was so fucking horny.
"Did you enjoy that, Doug?" his wife Darlene's sharp voice emanated from over his shoulder.
He froze. He turned to find Darlene and Candice. They were both naked. Another dog was with them.
He watched his wife scratch the dog's head. It licked her fingers before lapping at her bald pussy. His wife made no effort to stop the dog. Strange. Then, he noticed the dog's pink cock jutting out from its sheath.
"I…, uh…, came home early," Doug began.
"I see that," Darlene smirked.
"I thought Claire was…, in trouble…, so I…,"
"So, you thought you'd have your daughter suck your cock and then call her a slut?" his wife queried.
Claire wiggled her stuffed ass and smiled as she watched her daddy squirm. She was positive things would be a lot better now. No more hiding and being secretive. She, her mother, and Candice, could now fuck and suck Duke and Prince whenever they wanted. She could probably even bring home some more dogs for her mother and Candice to help train. Claire licked her father's cum from her lips, then had a thought.
"Hey mom? Guess what? Duke's cock is up my butt! I taught him a new trick!"