My two sisters put my mother in a nursing home (she has dementia) and took over her finances. I was estranged from one of them after she assaulted me in front of my 90 yr old mother and her 4 children. The two teamed up against me and my brother. They refuse to give us any financial information regarding my mother and said she took us out of her will. My sisters felt entitled to take over because my brother & I did not visit my mother. We did stay away for a short time because of the fighting and drama. It's funny how they decided to do this when we weren't around?? I am now visiting my mother but I do not come alone and I live close by. My sisters still want to exclude me & my brother from everything. They didn't even tell me when my mother went into the hospital. When I asked my sisters about the finances they told me to get a lawyer. I tried asking my mother and now my sisters want to keep me away from her. What are they hiding?? Should I get a lawyer?
I understand your frustrations, but most importantly at this stage of the game, as Cattails said, make the time you spend with her as stress free and loving as possible. The rest will take care of itself. Take care.
Also realize that with Mother in a nursing home there is not likely to be much left in the estate to be worth fighting over.
Before you get an attorney, figure out what you want the outcome to be. Go in with a specific goal ("I want to see financial records for this year and every 6 months" or "I want to be able to invite my mother to my home periodically." or "I want to be POA" or ... whatever it is you want.) Be realistic in asking for the kind of help lawyers can provide. "I want my mother to trust me. I want my sisters to love me. I want my brother to apologize. I want my family to drop the constant drama" might truly be things you want but it would be a waste of money to hire a lawyer for them.
Sort out what you want a lawyer to do for you first. It is cheaper to go in with a specific goal than to make the lawyer drag it out of you at an hourly rate. :)
Good luck.