My fiancee had a bachelorette party weekend with a bunch of girlfriends. They went to florida to hang out on the beach. We have always talked about how we both hate the traditional expectations of these things - strippers, being decorated with plastic penises, dares, etc. I never told her what she should/shouldn't or could/couldn't do this weekend, but we both have always agreed that any kind of intimate contact with the opposite sex is cheating.

Anyway, I found out that her weekend was full of the kinds of games and dares we always said we didn't like. No big deal. But one of the dares was to make out with a guy. She did. They kissed, her sitting on his lap, for about 10 minutes.

I found out because she started telling me how they did have some of the "ritual stuff" but she didn't do anything like kiss someone. I was surprised they did all of the games and stuff because she had told her best friend/maid of honor she didn't want that, but I wasn't upset. She's not a good liar though, and I could tell she wasn't telling me everything. I must stress that she is usually very honest with me. More than anyone i've ever known.

Anyway, talking to a friend of hers, the truth inadvertantly slipped. I confronted my fiancee who said it did happen and had just been too afraid and ashamed to tell me.

I am hurt, angry and I feel betrayed. I have been cheated on in the past and she knows how important issues of trust are. We are supposed to get married in one month and I am not sure what to do. Part of me wants to call ti off. I'd like to say "it was a mistake" and let it go with the understanding this kind of mistake can't happen again. But I feel like my trust has been shattered. Any thoughts on this?