Could he be having an affair? It seems like he's unreasonably suspicious of you from what you say. A man who is cheating on you might like to imagine that you're cheating on him, so that he doesn't have to deal with feeling like a jerk, or deal with the reality of his actions. I'm sorry for your kids...it must be hard on them; I hope he and his family are able to maintain some contact with them even if move on romantically.
I have the same questions as Carrie. What was the reason behind him calling off the wedding? Why did you continue to stay with him and put up with his accusations of cheating and having someone else's baby when you have given him no reason to suspect you cheating? Truthfully, I think you should talk to a professional to understand what emotional abuse is and why you would value yourself so little to put up with this kind of behavior. He is emotionally abusing you and you are fortunate to get away from this man.
Welcome to the board melanie2298,
::After