I work f/t as a teacher and dh is sahd. Dc are 4 & 7 and, over the past few years, we have got into the routine of dh taking the dc to his mother's during the holidays. In a one week holiday, it will be for 2 nights, and this time, as we have two weeks, the plan is for him to take them for three nights next week. I thought this was working well for everyone - I get some time to catch up on work and relax, dh gets to visit his home town and catch up with friends etc, and mil gets to spend time with the dc on her terms.
However, dh tells me now that his mother has said it would be nice if I went with them this time so that we could all spend time together. The problem is I have a huge stack of marking to do and this term has been a difficult one - I feel I really need the break. Moreover, and I know it sounds bad, but I just don't want to. Mil is great, but she is over-bearing and, tbh, I really thought she liked being in charge with the dc. I feel the holidays are my time with them, and I would rather she have them 'to herself' for a few days, than me have to watch her taking over with everything and me having to give in to things that she does differently. I realise that sounds contradictory, but it makes sense to me!
I do see dh's family a few times a year and, while I get that it would be nice for us all to be together more, it's not an ideal world and this arrangement really helps me cope with the manic term-times (though it doesn't happen every holiday - probably about 90% of them).
AIBU to refuse, politely, to go? Dh says she has been on about it for a while and it's important to her, though he hasn't mentioned it to me before now? 