MIL has never offered to have DD2.4 over night, which although is fine and her choice, It's a sore subject as she used to have DSD all the time and still would, but we have told her she can't have one and not the other as its not fair.
As we live a fair bit away from MIL she doesn't really know DDs likes and dislikes, personality or much about her.
So DH comes home last night to say MIL now wants DSD and DD for over night stays once a month.
Now whilst I would love some time to myself, whenever DD has slept ot sister In laws, or when she used to sleep at my sisters she was a nightmare for around 4 days following (bad behaviour and sleepless nights), so to have the one night of a break just seems counter productive.
DD has never been a good sleeper, but I've been working on it and she will now sleep most nights from 7 - 7 with no wakes after 11 and I really don't want to mess all this up, which I fear having an over night stay will do.
I've told this to DH and said MIL is more then welcome to stay at our house, but he doesn't agree and said it will upset MIL and that I'm just been ungrateful and I should never moan again I need a break.
AIBU for saying no?