Quoting babymama0324:" <blockquote><b>Quoting Alyssa's mommy [EBFT]:</b>" Well, what did he tell you he was ... [snip!] ... Apparently they r old friends but he shouldn't just have her over and not tell me u know... I just feel lied to and hurt"
Okay, yes he should have told you but maybe he didn't see anything wrong with it so he didn't mention it? Men are dumb they don't always think about things.
Or the other option is that he purposely didn't tell you because he knew you'd be upset/angry and he just wanted to hang out with his friend.
Either way he obviously told her about you, so I highly doubt he was trying to cheat. BUT be prepared to have some serious trust issues between the two of you, I'm sure he's not too happy you did what you did even if you feel justified in doing so.