I am 33 weeks pregnant and exhausted and grumpy, so fully prepared to be told IABU as I honestly don’t know at this point!
DH does not, and never has, got on with my SIL. She’s number 1 on his least favourite people list 
I am close with my DB and get on fine with SIL, she’s very family oriented which I really appreciate as it means that I spend a lot of time with her and my DB and our DS’ are very close as well.
DHs family are not close, admittedly they live abroad, but they don’t speak regularly and family get togethers etc never happen. We’ve been together 8 years and I’ve never met anyone outside of his nuclear family.
So, it’s christmas. We have a number of Christmas type activities planned with DB, SIL and DN. As these get closer the frequency of whining from my DH has intensified. Whenever I try to discuss logistical arrangements for these events I am met with sarcasm and negativity. It’s really starting to get me down. He told me at lunch today he is ‘dreading’ these days out and wants to do things just me, him and DS spontaneously and is annoyed we have things booked in. We have had one family Christmas Day out and have a visit to Santa just the three of us planned. There are also a few days in the run up to Christmas Eve that are free just for us, I’ve told him he’s welcome to suggest/organise anything he likes for these times!
My AIBU is that I snapped today and asked him to do me a favour and keep his negativity to himself. I don’t expect him to have fun but I just can’t listen to anymore of it. I was so looking forward to a nice, happy Christmas before DC2 arrived and now this creeping sense of dread I’ve been ignoring has turned into me in turn just feeing like I don’t want to do any of it either because I’ll be dragging around a surly DH with a face like a smacked arse.
He says he has to be honest and I can’t ask him to keep his thoughts to himself, it’s unfair.
So AIBU and irrational pregnant woman? I am so angry right now I can’t tell 
Sorry for the long post!