This one is a little mature
When I was somewhat younger and not as well aware of my ablility to swoon girls, I....
Accidentally seduced my little sister's friend.
So this got to the point where some of her friends came over, we went downstairs and played a random game of darts.
Oh god, here comes the more mature part.
So, I won the dart game, and we went behind her couch in a large space. We put blankets on top of each other and called it the "Blanket Club", I think. So....she and I went under the same blanket (Its not what you think it is, ok?) and she got on top of me (Trust me, it isnt "that"). Eventually after that, she began to kiss me, and after about 2 seconds of kissing me, I couldn't take it anymore and I said Stop stop stop, forget this, I don't like this and went home thinking "What the fuck did I just do?"
Somehow, her mom found out and told my dad. I expected to get yelled at, but I didn't. Since that day, I've always tried to forget it and each time my sister hung out with her while she was over, I tried avoiding an event like that to happen again. Because technically, her doing that would've made me a sex offender (Cuz she is much younger than me).