I live with my 91-year-old dad. I cook, clean, buy groceries, take him to dr or to get haircuts, etc., and pay all his bills. Plus I pay him $200 a month for "rent". One sister lives out of state and calls him almost daily. The other sister lives five minutes away and helps on occasion taking him to the dr when I'm not available. She comes once or twice a week to visit for a couple of hours. Neither sister helps out financially. I have tried to discuss it with the local sister, but she says things like "you live with him." She and my dad feel like since I am being given a roof over my head and I chose to live with him and would be paying bills even if I didn't live with him, then my sisters are not obligated to help out financially. Are they right?