Most Helpful Guy
Why did you get back together with your husband if you want to cheat on him? You say in your question details that you want to have sex with this other guy. Okay, fine. At least give your husband the dignity of knowing you ended your marriage with him before you started screwing another guy.
Most Helpful Girl
I think you should try to keep working things out with your husband. This other guy is a just a temptation and a roadblock to restoring your relationship. Have you thought about couples' counselling?