My father is 86 years old, he has mild dementia but otherwise very independent and healthy for his age. My sister, who is single and has an 18 year old at home, is living with him full time. He pays rent and helps with bills. My sister has become resentful that I don't do my part, we live in the same town within miles from each other. I buy him clothes, some groceries and occasional meals out, he comes over to my house at least 3-4 times a week. Her idea is that my father should live with me three days a week and with her the other 4. I feel that will be confusing and unsettling for him. I feel that it has to be a clean cut, either my home or hers. When he comes to my house he asks to go home after a 2-3 hours, even if my sister is not home, he wants to be home.
I am looking for thoughts on the best way to handle this. I know in both our hearts we want the best for my dad.