Welcome to NT, sav3.
I'm sorry for the reasons you're here. I don't really feel qualified to offer advice on this subject as I've never experienced what you're going through.....but if it's been done twice I think I'd be asking myself if I really wanted to keep putting myself through this pain.
I keep thinking of the saying......."once a cheater always a cheater". I'm sure others have recovered from this very blatant breech of trust.....but I'm sure it takes some hard work from both sides.
Good luck to you.