Ok, so some background. Get on with MIL really well, have a tolerable relationship with FIL (but only for DH's & DC's sake). SIL & her DH are fine.
SIL sees MIL every week (she does childcare for her)
We live an hour's drive away from them. DH is a paramedic and therefore works a fairly heavy shift pattern which involves him working 8 weekends out of 10.
DH has been studying for exams since before Christmas (until he passed last week) so we've not really had any relaxed time together as a family.
We haven't seen his parents since Christmas. Due to DH's working pattern and having to be around to do school runs, we've not found an opportunity to go and see them. They virtually never come to ours (they did in December when I had DS but only stayed for 1.5 hrs) even though they're retired and have plenty of free time.
DH has a rest weekend this week (ie he's not working). He's already going out with friends tomorrow evening as one of our friends has just returned from 3 years in Thailand - which is fine. But he's just called to speak to his parents (who returned from 2wks in Trinidad today) and told them we'll go and see them on Sunday. I've agreed, but I'm pissed off - but AIBU?