Which should be more important?

Obviously there’s a lot to this story I’ll quickly sum it up -

Tried for 2 years to conceive, had 3 miscarriages along the way before 12 weeks, now due very soon with rainbow. Don’t talk to other halves family due to toxic mother in law disliking me and entire family taking her side. Partner hasn’t told anyone about pregnancy. Mother in law demands he leaves me and that he’s better off without me and she wants him to move on and move home or his family will cut him off. He does. Moves out, leaves me pregnant and alone, leaves all bills and responsibilities to me, moves into his parents house, claims he’ll still be “involved but kids weren’t something he ever wanted”. Told him we tried for years to have this baby how can that be true, claims It was just to make me happy and he didn’t have a choice. Told me he will still want to see his son a few times a week but his family are his family and he can’t cut them off or lose them even if it means losing me/us. Wants to remain in a relationship with me under these circumstances, no one in his family knows baby is coming in couple of months. Says that even though we have a child coming his family are more important to him. All his mother does is bad talk me and call me names and try to start fights. Should the family he come from be more important than the family he created?

(Ideally we would all get on and be one big family but his family have never gave me the time of day because he moved to a different city to be with me and they didn’t like that he couldn’t run them around everywhere and do everything for them)