I was trippin balls on shrooms and my sister brought home her boyfriend and her boyfriend's friend. She bangs on my door...I opened it and she asks if I could leave the house for a little while. I guess she wanted a threesome. I'm really rolling, so I know it's not a good idea to leave, so I tell her not to worry, I'm just gonna lock my door and pass out.

I look over her shoulder and her boyfriend is begging me to leave. I look at him and just tell him I'm tripping balls and close the door.

So then my trip gets weird, because all I can think about is my sister getting plowed by 2 guys. I don't know if you know what shrooms are like, but once something gets in your head, it just goes. Like I swear I can see through the walls and she's butt naked getting double penetrated, right? So I start getting paranoid thinking our parents are going to come home any minute and find my little sister, whose in high school, getting railed while I'm tripping balls.

I leave my room and find my sister giving one head while the other's eating her out. I'm not sure how long I stood there, but I watched her she didn't seem to care, so I said "Fuck it" and whipped my cock out.

Here's the thing... I'm not sure if I actually fucked my sister or just came on her face. It was like a dream and if I fucked her, then I just got up and walked into the shower. At this point, I'm not sure and she hasn't said anything.