I cared for my FIL with mets, at home with hospice. Dr's gave him 3 to 6 months.
He did have pain meds. He made it for 2 months.
I have to tell you though that the 2 months were virtually pain free and I have many wonderful memories of our time together. I still feel very blessed for being able to care for him.
Cherish the time she has left. Make sure she has her pain meds. and hospice.
God Bless you and take care.
Barb