Piano, something similar happened to me. He chose to be with her. We are not divorced yet...just separated. It has been almst 11 months now. He is very involved in my S life.
When I read your H's father abandoned him shortly after birth,it makes me think he is freaking out over the responsibilities of being a father and how to be one.
I was so worried that my WH would not be there for our son but he is. It is very hard to detach from him because I see him so often do to him seeing his son. This is good for my son but bad for me!
Here is the very sad but true thing: IF he does not want to be part of your baby's life, then it would be best to divorce him, raise your baby with help of family, and then whenever you are ready, look for a father replacement type/ new potential husband.
So think of that as worst case scenario.
Best case, continue divorce busting (I didn't find it until after S was born) apply no pressure, no R talks,be 100% distant (but if you want him to be inyour S life, I STRONGLY recommend that he is there at the birth so he will bond--every man cries, I swear, when they see their child born!)
So let us know how you are doing at 6 months pregnant! AND I PERSONALLY KNOW what it is like to live alone at 7 months-10 months while pregnant. It was very very very lonely and hard and my dr. told me to take over the counter sleeping pills. I worked, came home, went online, went to sleep. Repeated.
me,34 exH,34 S,16 months S:3/31/09-left for OW started DBing 10/09 d final: sometime 10/10 current: http://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2022856&page=1 met in 2004