My mother is in her early 80s and has no major health problems. She does not drive or have any friends and depends on me for about everything. ( my niece takes her to store now due to my own health concerns) She and my sister (who does nothing for my Mom) are always fighting and some how I get the blame for their shortcomings . After being told that the only thing she can be blamed for is my birth, I did not show up to take her to a dentist appointment ( cleaning) and told her from now on she must be nice to me if she expects me to be there for her. She hung up...three times How do I deal with her? I do not want to walk away but it is at the point where i feel i need to establish boundaries for my won health. It hurts to be the one who is always there for her and gets beat up in the process.