Porkchop, I think the only reason she didn't tell you from the very beginning what she had done was because she knew how bad it felt to listen to the things you had done. Really I think she was trying to spare you all the details and how shitty they would make you feel. Then, she started to feel guilty, especially with moving in together gettting nearer and nearer, so she spilled her guts.

Just do what 9ski9 said, he's been there, do everything better than any other guy could. You obviously love her, you two will both get over it eventually.

If you have to know details, ask her what she liked about the other guys, but only if you can stand it. If it will kill you, don't ask, but, if you can, listen to her, you might learn some things about her that you never knew before. You can learn what really turns her on, and past the sexual part, you may learn how she really wants to be treated. Once you know what she likes, you will be the only one who can satisfy her, in bed, and in every other aspect.