Large family, no one around.

family. I care take an 85 year old, never married, aunt. She has always been independent. Currently I live with her but she had a stroke. Since the stroke her behavior has gotten worse not better. Nasty, bitter comments and actions, acting like a child when her part time aid tries to make a sandwich for her, always commenting about money. Her brothers and sisters are absent, because, " she is too difficult, to nasty…" and I could really use their help with explaining to her that SHE needs help. I am burning out, like so many. Not sure what to do, talking to the family is just more frustrating and heartbreaking as they just run away. I understand that the years of her being nasty and curt with others is now coming back to haunt her, however, if I can find the compassion, why can't others?