You can have him declared incompetent. See a lawyer immediately. You can have them both declared incompetent.
I went through this with my mother. They would call her at 5am and try to get her to buy things knowing she was half asleep. I intercepted one of those calls when she was in the hospital. I had the pleasure of telling that woman exactly what I thought of her and her kind. You’re right. There is a special place in Hell for these people.
Hopefully, our generation won’t be such an easy mark, but then who knows what our mental state will be.
I don’t live anywhere near them. Social services said only my Mom could go through the lawyer because she is the only one who has witnessed it. I told their best friend, but she says he seems fine. It just became so complicated. Thanks for the good thoughts and prayers.