Someone once told me "words are formed of letters. They are spelled. When you speak words it is like casting spells. Be cautious in your choice of words for what you speak can become your reality".
I'm so sorry that your sister was given such devastating news. My uncle passed away last week. He too had cancer. He only found out 3 weeks before and I think that had he not known, could he still be here now? He had a beautiful life and enjoyed it to the fullest though.

Sending you positive thoughts of healing and love to your sister, you and your family. <3