My first AIBU post!
FIL keeps making comments like "what did your mummy do to you" and "is mummy being naughty" when DS (2yo) is having a tantrum (apparently he says it about DH too when I'm not about but when I'm in its always me)
Background of why I'm getting peed off is that FIL is very very sexist, MIL cheated on him and he's never gotten over it - 18 years ago!!!!!!!!!