*plap* *plap* *plap*

The sound coming from my room was unmistakable. It seemed to echo throughout the entire house.

*plap* *plap* *plap*

“I fucking knew it,” she swore under her breath. She dropped her purse and slammed the front door shut. “I fucking knew it,” she huffed. She sprinted up the stairs, her plump ass and tits jiggling the entire way.

*plap* *plap* *plap*

She could clearly hear moaning coming from underneath my door. “You fucker,” she cried as she threw open the door. “I thought I told you already,” she said in a low tone, “you use me or your sister for this.”

I sat there on my bed wide eyed. I hadn’t expected you home this early. The video on my TV continued to play. My hand was gripping my cock tightly. It stood an impressive 15 inches straight up and

glistened in the light. “I…mom…you’re back…early,” I stuttered.

“Yeah,” she said, hands on her hips. “I came home early cuz I knew you’d do this shit. You’re cock is way too good to be wasted masturbating.” She approached the bed and began to take off her clothes. She licked her lips in anticipation and gentle rubbed her pussy.

“I’m sor-“

“You fucking better be,” she said, cutting me off. “I know that you need to relive yourself, but you had better use one of us to do it.” She was talking of course about my condition. Roughly one in a million had it, hypererectism. I had already been blessed with a well endowed cock, but this was different. My cock and balls would continuously grow and swell in size, producing gallons of sperm. The only way to relieve it was to cum.

“Do I need to discipline you?” she asked me, getting on top. Her hand guided my cock inside her.

I moaned in ecstasy as she began to slowly ride me. “N-no mommy,” I exhaled. Her pussy gripped my cock tightly, milking it. “I p-promise to be a g-good boy, f-from now on,” I stuttered.

*plap* *plap* *plap*

The sound of her ass slapping against me was much deeper than the sound from before.

____________________________________________________________________________________________________________

Hey y'all! This is my first time trying to write and actual prompt. As you can tell, I'm super into excessive cum, massive cocks, and cock growth.

Some of my other kinks include but are not limited to: step/incest, milfs, creampies, breeding, multiple loads, public/risky sex, doggy, cowgirl/riding, blondes, big tits, big asses, and freeuse.

My limits are: gore, vore, scat, and BDSM.

Obviously I'd love to explore this scenario more. I'm open to other scene ideas and sister rp as well. I'm also down to have you play both mom and sister at the same time.

We can also extend it to outside the family as well, coworkers, friends, etc.

And feel free to bring your own ideas as well! I prefer reddit chats btw.