Jason rested his head on his sleeping mother's pregnant belly, listening to his unborn sister-daughter inside. Her pregnancy was five months along. It had been three months since she had revealed her affair with her son to her small-dicked husband Martin. Since Diane was aware of Martin's less-than-legal business dealings, he agreed to raise the child without a fuss.

Ever since then, Jason and his mother had subjected his father to every humiliation possible. They'd forced him to move into the guest room while Jason moved into the master bedroom with his mother. They fucked loudly, never bothering to conceal their moans of pleasure. They fucked in every room of the house, making Martin clean up the cum puddles they left behind. They would laugh whenever they saw him get an accidental erection to the perverted scenes before him. Martin soon left to stay with his mother Vera, a woman in her mid-fifties.

Diane was awoken by the kicking of her unborn child. "Morning, baby."

"Morning, Mom," said Jason, his ear still on his mother's swelling belly. "It sounds like our baby's hungry," he said with a knowing grin.

"Then I guess you'd better feed her," said Diane. Jason sat on the edge of their bed, his erection jutting proudly into the air, while Diane knelt in front of him. Opening her mouth, she expertly took her son's erection down her throat.

"Damn, Mom! You're such a whore! Giving your own son a blowjob and feeding his sperm to your baby daughter!" Diane bobbed her head up and down on her son's shaft before hearing him groan loudly, tightening his grip on her red hair. Diane didn't even taste her son's cum as he shot it right down her throat and into her stomach, where their hungry child was waiting.

After ten thick, heavy spurts of incestuous seed, Jason's cock softened.

"That was a good one, baby," Diane said as she wiped her lips. "Too bad your father wasn't here to see it. I miss making him watch and listen to us fucking. I hope he'll come back so we can humiliate him some more."

"We might not have to wait," said Jason. "I have an idea." He told Diane his plan, which caused her to burst out in cruel laughter.

---

Diane knocked on the door to her mother-in-law's house.

The door opened, revealing an attractive brunette in her fifties. "Diane, Jason, what are you doing here?" asked Martin's mother Vera.

"Hi Vera, can we come in?" asked Diane.

"Sure." Diane and Jason followed Vera into the living room, where they all sat down. "Martin's not in right now. I'm glad you're here though. I'm not sure what's gotten into him. He won't tell me anything. Does it have something to do with the new baby?"

"Yes," said Diane, her lips forming into a devilish smile. "The baby's not his."

"Wh-what?!" Vera gasped. "The baby's not my grandchild?"

"No," said Jason. "It's your great-grandchild." He unzipped his fly and revealed the eight-inch erection that had fathered the child in his mother's womb.

Vera stammered wordlessly as she stared at her grandson's cock. After a minute of baffled silence, the first words out of her mouth were "It's so big. Um, I mean..."

"Don't be embarrassed," Diane said to her mother-in-law. "It's natural for a woman to be amazed by such a perfect dick, even if it's her own grandson's. Was your husband's cock this big?"

"No," said Vera, her eyes still fixed on Jason's crotch. "He was nowhere near that big. I had no idea a man's cock could get that big, let alone a boy's."

"Do you want to take it for a test drive?" asked Diane. "I can tell you want it."

"N-no!"

"Then why are you fondling your breasts?" asked Diane.

Vera looked down and saw her hand unconsciously fondling her ample bosom. Shocked, she let her hand drop.

"Have you ever had an orgasm?" asked Diane.

Vera shook her head.

"Try it," said Diane. "After a lifetime of small-dicked men, you deserve it."

"I deserve it," Vera whispered to herself as she straddled her grandson's lap. "I deserve it." She lowered herself onto his cock. "I DESERVE IT!" She impaled herself on his upright shaft.

Jason began thrusting up into his grandmother's body. Unfamiliar pleasure coursed through Vera's body as she felt her grandson's shaft inside her, eliciting loud moans of pleasure.

"Your cock is so huge!" Vera told her grandson. "I can't believe you're related to my worthless husband or my son."

At that moment, the front door opened and Martin walked in. He shut the door behind him and froze at what he saw. "M-Mom?"

"Sit down, Martin," said Diane in a commanding voice that Martin had no choice but to obey.

"I love you," Vera said, only to gasp in embarrassment. She hadn't meant to say that.

"Don't hold back, Vera," said Diane. She stuck one hand down her panties and fondled her swollen tits and pregnant belly with the other. "Say everything that you're thinking."

"He's AMAZING, Martin," said Vera. "He's bigger than your father and MUCH bigger than you. Fathering him is the only good thing you've ever done. I'm ashamed to have brought an inferior male like you into the world."

Vera's vicious words caused Jason's balls to churn. He knew that soon he'd launch a stream of cum into his grandmother's womb. "Granny, do you think I'll get you pregnant too?"

"I hope so, baby," Vera answered in between her moans of pleasure. "I hope you give me a boy. Twins! TRIPLETS! I want you to give me three big-dicked boys to fuck me for the rest of my life! I need to make up for giving birth to a tiny-dicked piece of shit who can't please a woman. Knock me up! Make me pregnant! Keep me pregnant for the rest of my life!" And Vera came, swept up in the intensity of her first orgasm ever.

"Here it comes, Granny! My cum! OUR BABIES!" Jason came with the power of a fire hose, filling his grandmother's womb with his potent sperm. Diane screamed in pleasure along with them, cumming all over her hand and soaking the couch beneath her.

Martin couldn't take it anymore. He ran out of the house and drove away. His wife, son, and mother all ignored him, too wrapped up in the afterglow of their climaxes.

Driven insane, Martin didn't watch where he was going and had a car accident, killing him instantly. Jason fucked both his mother and grandmother while they were in their black funeral dresses and they went to the church with his cum dripping out of their cunts. Martin's existing funds from his business endeavors and life insurance coverage gave his family a massive amount of money, giving them lots of spare time to "enjoy each other's company."

Diane gave birth to her daughter, who she named Amy. She would later give birth to another girl she named Cindy. They'd be fed their father's thick, creamy cum every day from the moment of their conception.

Sadly, Vera didn't get the triplets she'd hoped for but she did give birth to a well-endowed son she named Roger. She later gave birth to two more boys that she named Dick and Rod (She had a strange sense of humor). To Vera's relief, all three sons inherited their father's large cock and would pleasure the women of their families for the rest of their lives.