Shouldn't have posted this on Reddit because everyone will just tell you to leave. Men aren't perfect, women aren't perfect. I'm not saying what he did was okay. At the end of the day you have to decide what's best for you and your relationship with him. Get counseling, talk to someone about it. Ultimately trust was broken at a very special moment in you're life and for that I'm so sorry. At least he was honest and told you the truth about how he really feels. Hopefully if he has a brain cell left he'll block her and try to be the best dad and husband he can be now. Also seeing his kid should remind him he's a man and not a boy chasing hoes. And don't lie to yourself, you're beautiful girl. That bitch hasn't delt with his heart, his dirty laundry, helped when he got sick, cooked and cleaned and ran a home with him. And she sure as hell didn't pop a kid out for him. Fuck her, that was all your hard work. You gotta decide weather he's still worth it or not and no one gets to judge you weather you stay or go. My 2 cents for what it's worth.