18

It's a Saturday night, and I'm laying in bed with my beautiful girlfriend. We're in her childhood room, at her parents' place, there visiting them for the weekend. Earlier tonight, we all watched a film together; the two of us, her mom, dad and her sister who still lives at home while in college. We're in our early thirties, stable jobs, stable relationship. Life is good.

In a bit of an uncharacteristic lapse in judgement, we ended up fooling around a bit after we got alone in my girlfriend's room. Nothing crazy, it's right next door to her sister's room after all. Just a bit of naughty touching, wandering fingers, hands... It ended up fizzling out after we realized we were a bit too tired to get into anything more feisty.

Despite this, or maybe because of it, I have a hard time sleeping. I'm laying there, staring at the ceiling, girlfriend resting her head on my chest, not finding any calm. Random work-related thoughts passing through my head, random sexual fantasies about a girl I used to know, just incessant mental buzz.

Eventually, I untangle myself from my girlfriend and slip out of bed. I have to do - something - otherwise I'll probably die of boredom. Might as well have a glass of water or something. I quietly push the door open, tiptoe out and close it behind me. Walking softly, I make my way to the kitchen, on the other end of the house.

The water is refreshing. Maybe this was what I needed after all. I stand there for a few moments, by the kitchen sink, just breathing and relaxing. Yeah, this should be fine. I turn, preparing to go back to bed.

"Hey there"

I'm jolted by the sound of your voice. You're just standing in the hallway, looking at me. My girlfriend's 21-year-old sister, in just your panties and a T-shirt with some band logo. "Gonna steal something?", you ask playfully.

Hey all! looking forward to seeing where this leads.

Will sis be slobbering all over my cock right then and there in the kitchen? Make me stagger against the countertop holding a hand over my mouth to keep from groaning out loud as I blow my load down your slutty throat?

Will we end up going outside to get some privacy, so you can dirty talk to me while I push inside you? Will you tease me about how much tighter, how much better your pussy is than my girlfriend/your sister's?

Let me know if you have any other ideas or angles! Very interested in your takes on this basic premise.

Kinks: incest, cheating, lingerie, dirty talk, cum play, some humiliation

Limits: scat, snuff, heavy violence