My sister moved to mexico when she was 14 and I was 17. Fast forward 14 years(21 and 26), she decides to move back. By this point, after not living with her for so long, she was practically a stranger to me. Also, her being away from her home city so long, she didn't really know anyone here anymore either. So we start hanging out again.
We find that we have a lot in common, and generally have a really good time together. I should also mention here that I was in the middle of breaking up with my girlfriend at the time that was with me for 7 years.
Anyway, one night we decide to go to this kinda uppity bar(you know the kind...where ppl drink and play chess). We met a husband and wife there, and asked them to join us at our table. It became quite obvious they were out looking for a 4 some/hookup type deal. The wife was playing with my leg under the table, and the husband was hitting on my sister like crazy. I talked to my sis in private, and she wasn't really feeling the vibe from these two, so we politely leave.
We stop off and grab some beers for home, and head to my place. We were talking about these two all the way home, and honestly I think we were kinda patting ourselves on the back for both trying to be picked up. At some point it came up (insert total drunkenness here), that we really didn't need them at all, we could just fuck each other. I remember the line (I have the right part, you have the right part).
Couple more beers in, we were lying in my bed, and we just decided to go for it. I still remember her pulling her shirt off. As soon as she did that, I knew this was ACTUALLY going to happen.
She gave me head, and then climbed on top of me, and stuck my dick in her. I remember being surprised at how much pubic hair she had. Like, really curly. She told me I could fuck her ass as well, which surprised me...cause, well honestly I was still trying to reconcile in my head that my little sister wasn't still a virgin. We never did do anal.
So...end of the story is typical. She and I sobered up...she blamed me for having sex with her, even though last time I checked, it takes two to tango. She even went to counselling over it, apparently cause she couldn't justify her actions to herself. She got married, moved to Australia with the dude, and I haven't seen her since.
Wanted a true story? There ya go.