When I (female) was a young teen, around 14-15, I spent a lot of time with my best friend. At the time, she lived with her dad, and I was there more than at home. They were more of a family to me than my own.

One night, my best friend and her siblings all had friends sleeping over. There was a lack of beds so I slept in the living room on the couch, since I knew the family the most, while everyone else shared beds and rooms. Her dad slept in the living room, he had a fold out bed-couch. So he folded out his bed every night. I slept on the smaller couch next to his.

While we all went to sleep, her dad put on some movies on the TV and chatted with me. He was like a second father to me at this time, so it was really cosy. We watched an episode of X Files, and some of The Godfather. I got tired and turned my face to the back of the couch, away from the room.

I remember hearing him starting to moan, silently. He was breathing heavily and his bed squeaking. I hadn't fallen asleep yet. I didn't know what to do. I just faked being asleep while he continued with what he was doing, which I guess was masturbating.

After it had happened, I didn't tell my friend. I just lived with it. It disgusted me, and I stopped going to her house. A few months later (might have been a year?) her dad wrote to me on Facebook and asked how I was. After a short conversation he asked "A thing I've been thinking about. The last time you slept here.. did you fall asleep fast or were you awake?" I felt disgusted to be reminded by this. I just said I fell asleep fast and don't remember since it's been such a long time. "Haha phew! Good!" He replied. I ignored him from then.

I can't say how long it's been, to not identify myself, but it's been over a decade since this. But I still haven't told my friend.

We are older now, she moved away from her dad and does not have a good relationship with him anymore. Her younger siblings still live with her dad though, the last I heard.

I feel that I might offend her by accusing her dad of this if I tell her? She might wonder why I didn't bring it up earlier?

Should I tell her? Does she deserve to know? Or just let it be? I don't know what to do