To be honest LC I found it a lot easier to go alone in my recovery. I had a fiance, who was either playing around or having some kind of mental breakdown. Once we split up everything was a lot easier because the only person I had to worry about was me. And that's who YOU have to worry about. Worry about YOURSELF. If your wife is cheating on you and you know this for a fact then she isn't going to be a major rock in your recovery for long. The only person who can be a major rock in your recovery is you. I'm not going to tell you what to do. It's a choice you are going to have to make for yourself. I hope you make the right one. The most important thing is your sobriety. Guard it in anyway you can. If you have to make some drastic changes first off then that may be what you have to do.
Natom.