To be honest, if he is claiming the child is not his then I would be inclined to let him carry on believing this, just to get him away from you and the baby. He WILL NOT change and the longer he is in your life, the more chance your new baby will be drawn into his lifestyle. Children learn by example and obviously the example your ex fiance will set is not the best for your child. Please be careful and give this man a very wide berth. Good luck. You are better off without him.

I wouldnt want this man in my life or my childs life, sometimes the best move in life comes to us in a whisper...do you really need or want him? find your unborn child a good father...let them bond from the begining!