He has been away for a year. Now he want POA back and is trying to take over her care. My other sibling and I took over her care needs when he left. Got the legal paper work poa etc. He can be manipulative my mother to give him money and is now threatening to have the POA revoked by taking her to another attorney. We do not get along at all. I don't know how to talk to mom about him. Even when I have pointed out the financial abuse she refuses to see any wrong doing with him. What can I do?