DDs birthday is the sam day as MIL. usually wouldn't matter but MIL has a big important birthday this year.
BIL has organised a big family meal out on MILs birthday.
He's just informed us that no children are invited. Most the other children in the family are younger and too badly behaved wouldn't enjoy a 'nice' meal in a 'nice' restraunt.
AIBU to tell them we won't be going because DD2's birthday that day. She'll be in school all day and I don't think it's fair to get a baby sitter for all evening.
BIL thinks I am.