AAAARRRRRGHHHH!!!! Can't say this to her in real life (probably just as well) so am venting here.....
We finally sold our house at the end of Nov after being on the market since Feb last year. Our buyers love it and their buyer is a first-time buyer who told them she was in a rush to move in. So far, so good.
So, we all pulled out the stops to get the move done ASAP which is what we all wanted anyway. We all agreed mid-end Jan for completion. Patience has never been my thing and I am due to give birth in March so we all wanted to move things along as quick as possible.
The first time buyer has been hard to contact and information has been misleading to say the least.......we have already delayed exchange and completion 3 times and today she is apparently saying she now wants to wait until middle of March as she isn't around until then (moving down from London).
We were all set to exchange today and move next Friday - this has completely come out of the blue and I AM FURIOUS!!!!!!! 
AIBU to expect her to at least keep us all informed? She is aware that I am pregnant, and the implications of a delay!. I know she doesn't have to do anything legally, but surely morally at least telling us her thoughts BEFORE the day we are expecting to exchange isn't asking too much is it?!?!? I mean she must have known she wanted to delay things and she has known the planned dates for weeks.
GRRRRRRR!

OK, rant over. I feel a bit better now thanks 