Family feuding is possibly not out of the question when dealing with the health of a loved on. You the daughter, her the sister. Legalities, who has power of attorney. This is an important issue. That person has FINAL say if the loved on, your dad cant say. If you dont have one, get one ASAP. Do what you think is best and try not to get yourself upset with her. YOU CAN BEST THIS THING, Karen. We are all here for you. Best Wishes..Carol...