Listen to her and let her talk. I was just visiting with a friend today who is in the late stages of cancer. She's very frustrated that she can't finish all the things she set out to do. She also talked about some regrets. And reflected on what a good life she has had and all the wonderful things she has done and all the incredible people she has met. I just let her talk and we both just held each other and cried. I told her she is so loved. That's all I could think of to say.

My heart aches for you and your sister.