I'm trying to be happy and enjoy this pregnancy but it's hard because this is my second baby but…

I'm trying to be happy and enjoy this pregnancy but it's hard because this is my second baby but mine and my husbands second baby, and nobody seems to care about this baby or be excited about it. it really hurts both our feelings because we're married and happy and my sons biological dad is worthless. I mean my grandmother spoils Zayne to death but when I talk about this pregnancy, not even directly to her just if she is in the room and someone asks me about my morning sickness or anything she always has to come back with a rude comment like "I don't feel the least bit sorry for her. she did it to her damn self" and I just don't understand why she can't be happy for me that I'm married and starting a family with some one who loves and takes care of me and my son. it's so discouraging.