I'm sorry for both of you.
I am very sorry to read about your mother and the situation the two of you have found yourselves facing. Unfortunately, I can't shed any more light on your questions as only her treating doctors are truly in a position to answer them. Anything you hear or read on the internet will not be based upon your mother's exact medical condition, her latest labs, clinical observations, and complete medical history.
The best advice I can give you is to tell the docs just what you posted: "I want to know more!" The doctors will do their best to answer all of your questions fully, I'm sure. If they can't give you a firm answer to any question, inquire as to the factors that make it hard for them to do so.
I do hope that you get the answers you seek from her docs if that will help you through this difficult time.
regards,
ML