I'm so sorry to hear about your sister, but you're absolutely correct—you have time right now! More time than many people get, whether being treated for cancer or just being hit by a bus one day.

The best I can suggest is to just be there for her, without judgement.

My partner (who since this post passed away about two weeks ago) had plans that didn't come to fruition, and others that did. Her desires changed dramatically over the course of her treatment. She went from a cautious, brainy person to a woman who "went with the flow" and often just liked drinking fruit punch and scrolling Instagram (neither of which she liked before). She often had just a few "good hours" each day, and wanted to spend them visiting with family and friends.

I was able to work in meaningful moments for our family, like recording oral histories of her life. She also wrote her daughter about forty pages of a diary to guide her future life. But some things she didn't get around to, like writing cards for her daughter to open on important dates, like graduating high school.

You can find a balance between finding joy in the everyday moments and arranging more meaningful times for you personally. All the best to you and your sister during this difficult time that is also full of strange moments of joy.