First of all she says it wasn't cheating because we weren't engaged yet. I put this out here the other day but never saw it posted. I'll try again. My girlfriend held out on sex with me until we had been together 3months. I was surprised but really liked her and it made me desire her more in every way. Once we did have sex it was great but I noticed she was much "looser" down there than any of the girls I've been with. I blew it off as genetics. All goes well for the next six months except she was very stingy with sex, all else was great. She claimed she wasn't brought up that way and she wasn't comfortable with extramarital sex but she really desired it. We end up engaged and the night we did was amazing, we were in the bed for hours, we had never done that. Then there was no sex, it was all about the wedding and plans and hopes and dreams, for almost 12 weeks. I finally was at my limit and after a get together i let loose, I had been drinking and spoke a lot more openly than I normally would. She acted surprised and seemed to think that we had agreed to no sex until we were married. I never agreed to that although I did remember a conversation that we had about the minimal sex we were having, in her mind she was explaining that we were stopping until then. She was upset and turned it into me being controlling if you can believe that. I became quite and later she suggested we go to my place and just talk. We went to my place and she screwed my brains out. Before it was love making, this time it was sex. As soon as we started I noticed a big difference in what used to be "loose", it wasn't anymore, I mean at all. I made several references during sex about how tight she was and she said nothing until after. She said she had been working out with her sisters squite o she would look great in her wedding dress. Bought it, hook line and sinker. To shorten a long story I found out that she had a fuck buddy when we started dating, she apparently didn't cut him off until we were engaged. I had good information and once I mentioned his name she owned up to it. She apparently felt that since we weren't engaged we weren't exclusive. My god, we were together everyday for almost nine months till I proposed. She went to HS with the guy, him being a few years ahead and her having a crush she acted on after she was out of HS and ran into him at a party she went on to explain. She fucked him that night for the first time. They went out a few times but he saw other girls and it never happened for them as a couple, but she never quit sleeping with him, said she couldn't say no to him. What should I do? I feel very used and I worry that if she did that when we dated why would I not think she would mislead me after we marry. What do I do, I can't even think about the obvious thing she desired from him. I don't have that, will she start up again. She swears once we were engaged she stopped seeing him. Do I call it off?