ExH's gf is pregnant and was due around the end of this month.
It is DS' birthday tomorrow.
She was diagnosed with preclampsia about 2 weeks ago supposedly and will apparently be in hospital until the baby is born.
Because of this exH has said he won't be attending ds' birthday party on the weekend like he told ds he would.
Now, I know it isn't anyone's fault that she has preclampia and that can't be helped but aibu to be pissed off that exH is going to let down ds again because of this. I also know aibu to be upset about something so petty but I'm really worried that she will end up having the baby on ds' birthday and then forever more the new baby's birthday will be more important that ds to exH. Aibu? I probably am, I know 
PS: The only reason I say supposedly ^ is that exH has form for making up incredible lies to get out of things he doesn't want to do, he told his work once that I had had a miscarrige because he didn't want to go to work and needed an excuse
, so it's not that I disbelieve her I'm just not sure I trust him if you see what I mean. Not that it really matters I suppose in that the end result is the same!