4 days to decide.

Thank you to all that answer my previous question regarding my Mom testing to be competant but having problems with her memory. Most all agree that she should not be driving in her state of confusion. And that I should take the keys away regardless of what the Trustees and her attorney says.
However, my sisters the Trustees have a history of bullying me and I am afraid of them and the trust attorney suing me not to mention my mother would be extremely upset with me.
How do I protect myself against my sisters? For example, my mother begged me to come and live with her nod I agreed. The next thing I know is that I received an "Occupany" agreement from the Trust attorney chat my mother wanted me to sign. It had things in there about that I was not required to help my mother and that it would not be a caretaker relationship. That when my mother passed they would buy me a one way ticket back to the mainland as my mother lives in Hawai.
That if my mother gifted me anything over 14,000.00 dollars A year I would have to pay the trust back. Hawaii is very expensive and the agreement did not say whether free rent was a gift or use of her car, utilities etc. I did not Saigon it but my mother did. I have asked my mother repeatedly what is in the agrement and she doesn't know. She keeps saying her attorney and my sisters told her to sign it. All of them insist it was my mother who directed the attorney to draw up the agreement.
So I didn't go to take care of her. My cousin called about a month ago saying my mother was getting worse. My mother called almost every day filing up my voicemail begging me to come and stay with her. After finding out that hotel security found my mother wandering around confused I flew to Vegas to take her back to Hawaii. I am here for only a week and she is begging me to stay. so you can see my hesitation with taking the car keys away. Both y sisters have the means to sue me and it would give them the fuel to show my mother that I am the bad one. One of my sisters is a dentist and she is charge of my mothers medical decisions but she is also the one who left my mother at Universal Studios when my Mother did not use the bathroom fast enough. She eventually went back for her but my mother was 75 years old at the time. She is just mean. Just imagine what she will do to me.
I am sorry for sounding like a wimp but I want to make sure that I am doing the right thing. Again thanks for all the help!