I was at the funeral of my aunt and my brothers ex came to pay her respects. I was polite and courteous to the ex, hugged her, we cried a bit (we both loved this aunt so much) and I thanked her for coming.
My brother thinks she turned up to the funeral as a sort of fuck you to him and is upset with me because I have not shown loyalty to him.
My mum completely ignored her and I found that very petty. I think you should just be civil. She is the mother of my nieces and nephew who I love to bits. Periodically she won't allow them to see us if an argument flares up with my brother, they have a lot of anger and resentment there. I just think it's best to be the civil one for the sake of the kids stability.
Anyway aibu?