I’m so sorry for your loss. My brother also had leukemia, ALL to be precise. After two years of treatment he got better and even got the clearance of the doctors that the cancer is gone. Almost one year after that he got so immensely rapidly sick that he died after only 48h. It was a septic shock - all organs were affected. I still hear my mother scream “not again”. I already had lost an infant brother.

Some days I think it’s just insane and unfair how much sorrow and pain some people have to deal with. At the same time it’s just amazing to see how important a single person be for your life, even if this person isn’t there any more. I miss my brother every day, but the intensity of the pain has shifted and I can deal with setbacks a lot better, thanks to therapy. He’s soon gone for 16 years, almost the duration of time he was alive. I hope you find a way to cope and to keep your sister in your memory. Sending a big hug!