Not that it matters, but do you think there might be someone else? What you need to do right now is just give her plenty of time and space. Your going to be using that time, as a gift. To address the issues that she felt she could no longer count on your support.

Understand, your not out there to tell her your working on these things. Your doing it cause you know you need to make them. Your going to be the best damn father/husband you can be right now. You are going to become the man only a fool would leave. This isn't going to happen overnight, and she's going to think your going about this to win her back, not trust your efforts. She will need to see long consistent effort, and I mean LONG, before she might be willing to believe them.