Fiance

So my fiance an I have one child each from a previous relationship. His daughter is 9.. well there are issues at her mom's. Besides her there are now 4 other kids- one is a newborn. Well the daughter doesn't get attention there. She gets pushed aside. We recently became pregnant. The issues at her mom's house causes issues at our place. Well today he said he doesn't even know why he even wanted another kid when he needs to focus on his own.. the 9year old.. i'm not even sure what to do........ it hurts