I have just discovered that my father is "in love" with his care giver. He has given her many gifts, loans and is very influenced by her. Care giver states she knows my father is in love with her but that she has told him that she is not in love with him.
I have a family member who treats my elderly father like an ATM. I can't do much because he's still "with it" - even though he's quite old. I did take said family member aside and advise that I had my eye on the situation - the minute I can step in, I will....and they'll rue the day. Fortunately, that backed them off a bit.