That sounds like Grandma the first few years after her stroke. She kept insisting she could live by herself, even after Grandpa went into the nursing home (after HE'D gotten sick and Mom had taken as much care of him as she could while working full-time). Mom humored her for a while, but she was working and going by the house 2-3 times a day (hell, I was going by once or twice a week to help clean house and such myself), and simply burned herself out. She did far longer than I would have, but then again, she's a better person than I am.