My dad has Alzheimer/dementia but is still in the mildish stage as he knows who he is but can't really take care of himself properly. He is 86 and his girlfriend is 66. She has convinced him that my siblings and I want to put him in a nursing home and have visited his attorney so we can steal his money. She also convinced him to alter his estate naming her as his POA, medical POA, etc. She also invests a very large sum of his money with the insurance company she works for. We were able to get a family friend to intercede in regards to the control of his estate which is now being overseen by his attorney, the family friend, and his banker, but she still retains medical POA and tries to hide the fact that he has alzheimers by isolating him from friends and family. We are barely allowed to visit him. My question is: what are our rights as his children? How can we protect him and take care of him when we are blocked by her at every turn?