Your sister sounds like my brother. Trouble wherever he could make it. Didn’t matter that I gave him many thousands of dollars that was legally mine from checking and savings accounts that were in my and my dad’s names only (I had been handling paying dad’s bills for years, and DH and I were the co-successor trustees and I was the executrix of the estate) because I felt it was the right thing to do. I gave my brother the same percentages from those accounts that dad had authorized be done from his other accounts. He still made trouble. Plenty of it. No thank you. No pleasing him. Take care of you and what you need to do to handle the estate. Minimize the hassles where you can.
5 Likes