I feel really bad for what the timing of everything with you being pregnant. I wasn't physically left by my husband but while i was pregnant was when the cheating began for me. I think i partly used the same rationalization for staying as you are stating above which is so that our newborn son could be around both parents. In the end for me it was good and bad. My husband got to do some initial bonding with our son but it was bad on me because I was stressed and partly depressed at a time that was suppose to be happy for me.
All that to say that you have to do what is best for YOU AND YOUR BABY. It sounds harsh but your husband, my husband, and any man that will leave or mistreat his pregnant wife made his own decision and therefore has to deal with the consequences. YOU are not required to do anything but the right thing. If your husband wants to see the baby fine but you are not responsible for making that happen. Don't short change your experience as a new mom for trying to accomodate your WH.
Actually for my stitch that also had something to do with the turn around. if my husband called to ask about our son i wasn't rude or nasty and was upbeat with things that he did etc...However, because I moved away to a completely different state to stay with my parents and support system my husband didn't really get to see our son while i was gone. i sent him pics but that was it and that REALLY got to my husband. He realized that this was the type of life he was choosing.
One thing for you to remember is that you CANNOT MAKE ANYONE BE A PARENT. i wasn't going to force my husband to step up a be a father. That was his lost if he chose not to see our son, etc.
Basically, don't think about your husband and dealing with him as your child's father. That is his burden to carry and his choice to make. let him deal with it and you just be the BEST mother you can be. It is hard but so worth not having that stress in your life.
Me: 28 H: 32 1st marriage 4 both 1 1/2 year married 2gether for 9 1S: 6months 1stepson: 2yo