What a beautiful post, Joan!
Autumnrain, I just wanted to welcome you to the forum. There isn't much I can add, but if it's possible to get Hospice involved, they are wonderful with terminal illness. Unfortunately, liver disease patients tend to deteriorate very slowly over a long period of time. Is your sister not a candidate for transplant?
Loss is so difficult, regardless of the cause. I lost both my aunts over the weekend. Although they were both aged and it was not unexpected, it is still a great loss and I am grieving. I flew out of town to be with one of them in her final days, and it was hard not to cry in front of her. However, I was able to tell her how much I appreciated all she had done for me and how much I loved her. I also sent little cards often to the other aunt. That is all I know to do--let your loved ones know how much you care and be there for them to offer support.
"But that was yesterday, and I was a different person then."
Alice in Wonderland, Lewis Carroll