Am 20 weeks with dc2 and we found out today that it's another boy. My ds who's 2.7 is wonderful, I love him so much, he's so funny, bright etc etc... And I'm thrilled to be having another one (although he has a lot to live up too 
But dh also has a daughter, dsd is 8 and lovely, and while I'm more than happy with 2 boys (and fortunately was pretty sure all the way through that dc2 was going to be a boy so it wasn't a huge shock) I can't help but feel rather sad that I'll never have a daughter but my husband does. I don't think I'd give it too much thought if it wasn't for that, if that makes sense.
Anyone else in the same position and feel that way?