Congratulations, Cheater. I think the best tack once you are back together with your H is to act as if everything is fine. Be as nice to him as you would be to a new beau. Treat him like time with him is special, i.e., dress up, wear make-up, don't curse, say please, thank you, hello, good by, good morning, etc. You need to be the woman who he wants to be with, not the woman he has to be with.
