The situation is that my Dad (85) has some dementia issues (also diabetes and heart issues) but still knows who I am. My stepmother (78) was diagnosed with cancer and was treated, but she also has some dementia issues though not as bad as my father. They both live in another state and my father is extremely unhappy living there as my unemployed stepsister moved in with them to "take care" of them both.
I don't think my stepmother is cognitively able to make good health decisions about my dad. I'd like to be able to do that for him, but she and my stepsister have made it clear to me they don't want me involved.
I've done some research on my stepmother's type and stage of cancer and the prognosis is not great.
What is the best option for me? It's hard to listen to the anguish in my father's voice when he talks about his unhappiness at home, but I'm not sure of the best route to help him.