C.R.
S., I suggest you call American Cancer society and they can help you locate a good support group. I know St Joseph hospital has many services like that.
Gosh, change her sheets, clean her toilets, cook if you want to. Her brain is being otherwised kept busy, whatever you do is one less thing to think about. I have cancer and I know how special it is to have a good, KIND, big hearted friend doing these things...
C.