That stuff just sucks. My younger sister stole nearly $50k from my Dad's bank accounts when he was first suffering from Alzheimer's pretending to be "helping" him with his finances. We eventually uncovered it and turned my Dad's lawyer on her. Now she acts like the wounded child being unfairly treated since we forced her to sign agreements to revoke her share of the Estate with the money taken being all she will ever get.
She hasn't visited him at his care facility since we cut off her hand in the cookie jar.