Good advice Barbara,
Bonnie it is so difficult being a caretaker. There are some people thet you can't drag to get professional help. What they are feeling is real and having a death sentence hanging over you is not easy to overcome............. (It is now when the caretaker usually gives their pep talk and says honey the Dr. said there are a lot of people who are surviving and doing very well with this disease.) The problem is one is mourning and one is trying top move forward. Suggest to her to post her feelings and what sucks about having this disease. I tried this and before long I realized why I was so lonely and depressed. There is a lot of feelings to sort thru and getting them out will speed up the Healing process.
If that doesn't work put sugar on her pasta and tell her that you thought it would help sweeten her up. Cancer can be a battle in more ways than one.