OP, I can sorta understand where you're coming from. We haven't found out the sex yet, but I've had some strange encounters (namely with my dad) where it seems like he'll be annoyed or uninterested if the baby is a boy. I thought I was just being sensitive, but then on Sunday he said, and I quote, "Just don't expect anything if the baby's not a girl." He's my stepdad and doesn't have any children of his own, and I know he seems to bond better with me and my sister than he did with my brothers...but why in the world would you tell your pregnant daughter that you basically won't have anything to do with the child if it's a boy.
I mostly think it's an "empty threat" except my sister has two boys, and he doesn't have a lot of interest in them. He doesn't hold them or anything, though now that the toddler is more fun to play with, I think he interacts better with him than he used to. It just perplexes me.
My husband's side has only girl grandchildren and my side has only boy grandchildren, so I guess at least one side will be happy! My husband and I don't have a preference, though I think it's a boy and at first "wanted" a girl.
All that was to say that I understand being upset and confused when people seem suddenly less interested. It's enough to make me want to wait until the baby is born to find out!