I have never had a good relationship with my Sister and we have not spoken for 8 years, as I called out on stealing money from my dad who had dementia. Sadly he passed away on Monday, I have offered to be civil so we can make the arrangement for the funeral but sadly she is acting like petulant child and is now making plans with my mum ( who divorced from dad over 30 years ago) that my brother and I don't want and we are not getting a say in anything. My brother is seething and I can see this turning into a right shit show. If anyone has any suggestions how to handle would be grateful