Toby squirmed as he watched his daughter grow. His daughter was only four years old but she was developing rapidly, and growing in more ways than she should. It was her first day at school, but when she came home, she was different. She was now a little vixen, sporting a pot belly and wide hips. Her chest filled out into plump swells of breasts. She was very sweaty and very musky, as if she had been going through rapid puberty, her body filled with hormones. As Toby watched her undress, he saw a bulge in her panties, in the distinct outline of a fox sheath and balls.
"Oh god..." Toby muttered. "I'm having a son," he thought. "But that's impossible, she's not a boy... I have to get to the bottom of this."
When she was finished undressing, her daughter sat on her bed, her legs splayed, revealing both her pussy and her new balls and sheath.
"Honey... are you okay?" he asked, kneeling before her.
"I'm fine Daddy, I'm just excited for school tomorrow," she said, looking at her father with a strange intensity. Her nipples stiffened as she looked at him with young lust.
"Okay," he said. "Have a good night." He shut the door and headed to his room.
"Dad, wait!" he heard. She was behind him in the hallway, stark naked, her breasts bouncing and her new belly swinging as she ran. She leaped into his arms, wrapping her legs around his waist and kissing his lips. "I wanna have sex."
"What the fuck?!" he shouted.
She kissed him again, forcing her tongue in his mouth, and he felt her stiff member prod his crotch.
"I can feel how hot you are," she said. "It's okay, I love you Daddy."
He felt her penis throb and grow, and her new testicles churn and pulse, eager to release their fresh, young cum.
"Please fuck me," she begged. "The longer you wait to breed me, the more I'm gonna grow!"
"But..." he protested, "You're a girl, and... we can't... what's going on?!"
"Just fuck me Daddy!" she pleaded, humping her crotch into his stomach. His denial seemed to trigger something in her, and her feet paws began to swell. They grew larger, the toes elongating and becoming very thick and soft. Her legs followed suit, becoming even thicker and curvier, while her rump grew fuller and fatter. Her body was filling out into a feminine shape, a young woman's body, and her cock grew and stiffened. She moaned and cried out as she felt her new balls churning and her shaft hardening. Her new penis was much, much larger than any other vulpine, a true monster of a penis. She was already 9 inches hard, and still growing. Her glans was very large and swollen, and her entire shaft pulsed and throbbed as it continued to grow.
"Please," she begged. "My balls need you!"
As her feet paws grew, she became unable to keep her balance and her father had to help her walk. He led her into the bedroom and laid her on the bed. Her new cock stood fully erect, over a foot long and 6 inches around, her sheath swollen and her knot inflated. She moaned and cried and stroked herself. Her big belly seemed to give her a lot of pleasure, and her breasts began to rest on top of it. She was breathing heavily, her eyes rolling back in her head as she felt her cock pulsate.
"What's happening?" Toby asked, staring at his transforming daughter vixen.
"I need you so bad!" she moaned, her hands rubbing her belly and breasts. Her nipples were very stiff, her areolae dark and wide.
"I think... I think I'm pregnant," she said. "You didn't fuck me... so I'm going to give birth to a daughter to fuck me instead..."
She continued to moan and writhe as her body grew bigger and thicker, and her cock swelled even further, until it was 20 inches, and her knot was 10 inches around. Her breasts were now full and plump, each as big as her head, her belly a huge bulge on her body. She was very horny and very hot, her face flushed and sweaty, and she kept moaning and thrusting her hips. Her big butt jiggled as she thrust.
"Fuck me!" she cried, "Fuck me please!"
"Okay!" her father said, pulling down his pants. "I'll fuck you!"
She cried out as her father climbed atop her and pushed his cock inside her. But it was too late, and she was already giving birth, her new vixen daughter pushing from her pussy onto Toby's cock. She moaned and came hard, shooting her thick young seed all over her own belly. The newborn vixen pushed her way out of her mother, her body slick and covered in birth juices, and she immediately began to suck her mother's cock.
Toby fucked his daughter, the vixen giving birth to his granddaughter, who was now sucking her mother's cock. His new daughter was growing rapidly, her body quickly maturing into that of a 2 year old vixen with large hermaphrodite endowments. Her cock was 16 inches, her balls big and plump, her breasts large and bouncy. The two fox girls sucked and fucked each other, growing their bellies big and fat. Toby fucked them both, and as the new daughter began to shoot her seed, her mother's belly began to swell, filling with the fresh young cum.


Down the street, another little vixen came home from school. Her fat belly stuck out from under her shirt very visibly. She was also growing a penis and balls, and they were swelling rapidly. She was only five, but she had a full set of breasts and a cock. When she got home, she snuck up to her unsuspecting older sister, and ripped an enormous fart.
"Smell my gas and get fat, sis!" She giggled.
Her sister immediately began to grow. She was a beautiful girl, her breasts large and plump, her ass very plush, her belly round and smooth. But as she grew, her belly began to bulge and stretch, filling with gas. Her belly became huge and tight, and her sister kept farting and growing, until her older sister's belly was big enough to carry twins. Then the little vixen climbed atop her big sister and began to fuck her, her fat balls slapping against the older girl's ass.
"Take me to the mall, sis! Before you get too fat to move!"
The mall was full of beautiful and sexy girls, their bodies filled with hormones, their bellies big and round and their cocks even bigger. Some of them were already pregnant, their bellies stretched by the young life growing inside. Their fathers and grandfathers were fucking their daughters and granddaughters, impregnating them with young and fresh semen, their bellies swelling.
"This is the future," a young fox girl said.