He wants to be massive!

"I have to be bigger!" He moans digging his hands into his thickening member. "I'm sorry, honey! I-I can't fight this! I want this! I have to keep cumming! It's so hard, it's burning, the pleasure is too much. I want more of it all!"

He doesn't wait for a response as he goes whole hog on his cock. He strokes himself to completion over and over and over again. The lurid display has taken your brother, his cock is adding to the mess as he doubles over in orgasm.

"I guess, this was going to happen sooner or later," your mother throws her hands up in defeat. But then she surprises you as she enters the mess and gets on your father helping him stroke his already 4-foot cock. "If big is what you want, you're going to be the biggest."

"Honey," Your father releases a guttural moan. "oh, fuck!" His cock throbs in your mother's arms as his biggest cumshot yet splatters against the ceiling coating everything and everyone in cum. You watch as together they keep stroking his growing cock and playing with his bloating balls. But you know what really needs to be done if your dad wants to be truly big.

"Move, Mom," You tell your mother. She knows exactly what is about to happen and does so. Your father's throbbing cock is free and he looks to you with a pleading look in his eyes. You had no idea the desire burning behind them, but as he looks at you, you can't disappoint him. You turn around and with one calculated fall you land on his cock. His howl pierces the walls of your home and his cum shot blasts into your insides.

"Oh, Son!" he shrieks. You can feel his cock throbbing longer inside of you, and his balls bloating between your cheeks as your father starts humping you.

"You're mine for the next three days," you tell him. "I'll get you the biggest cock the city has seen."

For three days you stay coupled together. Humping, thrusting, jiggling, wobbling, smashing, and fucking. All the while his cock slowly but surely elongates deeper, and deeper, and deeper into you as it thickens and stretches your whole. His balls bloat bigger and bigger and you can feel your father already lying into them as they grow larger than a car.

None of you know just how large his cock has become. But you can't waste a moment not fucking to check. As the final day of your father's initial infection period comes to its end. Where his cock from here on will only grow by the natural passive growth that all hyper-infected people experience. The day is over and your time is up, and he slowly pulls his cock out. His towering balls reach higher than himself as he pushes his entire body into them to push them back. Foot after foot after foot of cock exits your cavernous asshole before finally the head pops free.

"Oh my god," your father moans. "It-it's so big. I love it! I'm so massive! I'm so much cock and balls. I'm so much man."