He sounds very irresponsible and immature. Any husband who would horse around with another woman anytime, let alone when his wife is pregnant, does not sound like he is very trustworthy. I am glad that you are working on your marriage, but it cannot be a one-sided arrangement. Unless he takes responsibility for his end of the problem he will continue to behave irresponsibly and perhaps cheat on you again. I hate to say this, but it does not sound like he is a great prize. I do not mean to be harsh, but I think you really need to take care of yourself and your children. If things work out with him then great, if not well you did your best. I am rooting for you