I am 67 and I am caring for my 59 year old sister who has metastatic breast cancer, which has gone to her lungs and lymph nodes. Her oncologist has put her on Letrozole and she told my sister that although the cancer is no longer curable, that with treatment, she can live for 5 years, maybe more.My sister is a free soirit. She never married, although she was living with her partner, and she has never wanted children, but she is a wonderful Aunty to her nephews and nieces. My sister always loved to travel and she loved going for long walks amongst nature. She is now so exhausted that she can not do much at all, and she spends most of the day on the sofa. A few days ago, she told me that she has made a decision, which frankly, horrified me. She has told me that she is stopping all treatment and she is going to let the cancer take its course. She told me that for her, life is not worth living if the only thing she can do is spend the next 5 years on a sofa. I am furious with her and I've told her that she is selfish and that she has a duty to fight for life, no matter how bad it seems. However, she has told me that her mind is made up. Please, has anyone else been in my sitiation? And if so what did you do? How can I make my sister see how wrong she is and how cruel she is being to her family? I am at my wits end.