Been dating a hot 19yo girl recently who's practically oversexed it feels like. Yesterday, however, we were hanging out with some friends, and I ended up in a poker game with her ex-boyfriend. We were both doing pretty well, I was buzzed, and got stupid and said for the next stake between me and him, I'd raise a night of sex with my girlfriend. I didn't talk to her about it beforehand.

Well, I lost the bet and had to explain to my girl that I had lost a bet of a night of sex to her ex-boyfriend. Thing is, she wasn't mad or anything. She asked me about what he'd expect of her (which I had no idea), thought about it for a bit, then said she'd go ahead with it and told me to tell her ex she'd go along with it.

Now tonight I'm watching her doll herself up before she heads over to his place. She's put on lacy black lingerie, including a thong, she's got a tiny dress picked out to wear over there, and she's telling me I shouldn't wait up for her; she knows she'll be staying the entire night over there and that her ex has pretty good stamina so they'd be at it for hours. Pretty clear to me now she's been wanting to have sex with him again, and I'm not sure how I feel about it.