She was so out of line. Are you near Chicago? We could introduce her to my 87 yo FIL. I think they would be perfect for each other.
Seriously, if you think she still has her faculties she probably is just feeling that age is an excuse to say what's on her mind. Is she lonely? Maybe she feels more that you and your brother don't spend enough time with her and she's hurt. Sometimes expressing anger is easier than expressing the "needier" feelings like sadness or lonliness.
I think you make an excellent point.
It's alright, man. I'm only bleeding, man. Stay hungry, stay free, and do the best you can.