I kind of think a girl caught me like 9 years ago. Her family came over for dinner or something, and I just needed to bust a nut. After a couple hours they were getting ready to leave, and I thought they were all upstairs so I got on the computer and looked at some porn. I had my hand in my pants, but wasn't technically masturbating; I was warming up. You know how you pinch the head before starting? That's what I was doing, basically.
Anyway after a few minutes I heard someone run up the stairs. I leaped to the door and saw her (she was around my age). Maybe she didn't see me, maybe she did. I have no idea. I haven't seen her since then, but I've seen her dad many times throughout the years and he hasn't said shit.