Aunt is having a big birthday soon. She has 2 dc. They decided to get caterers given the big occasion. My mother (who is her sister) told me today that she was contacted by aunts dc and asked to contribute towards cost of caterer! I’m dumbfounded! Admittedly my mother and aunt are very close but bear in mind my mother is elderly, retired and trying to sort out finances after her partner passed away. She is stressed about money and to top it off, this family are well off and both dc have incomes. Aibu to think that this is completely nuts to expect my elderly mother who didn’t even know this was being planned, to put money towards it. I’m seething. My mother has hosted them over the years and never asked for a penny.