We live in a seaside area and every summer holiday, without fail, SIL comes up with some convoluted reason why her 3 DC (my nephews and niece) should come to stay with us for an extended period. They're aged between 10-13, so in a way it's nice for my DD to have some company her own age, but at the same time I do feel like she's being a bit of a CF here, as she expects me to feed them - and they all eat ENORMOUS meals and they do have a habit of going off and getting into scrapes so I'm forever worrying about them.
My eldest nephew is somewhat opinionated and does try and tell my DD - who is saying she wants to identify as a boy, but that's another thread - what to do, which inevitably leads to a row. Dniece is sweet , but does tend to cry and get upset easily. My husband is a scientist and works ridiculously long hours, so it's just me doing everything, and we also have a large dog who needs a lot of exercise.
AIBU to tell SIL that I can no longer have them all in the school holidays?