Hey Doyd! Wow, your poor Sister has had so much to deal with, but I'm guessing she's a pretty strong lady AND she has you in her corner, which is a major plus.
I have a wonderful Sister too, so know that you are hurting b/c she is hurting. You are lucky to have each other and I will definitely say a prayer that all goes well w/her surgery and recovery.

Sending healing wishes to your Sis and hugs to you...