Hi Mindy,
Welcome to the site. I'm sorry to hear of your Mother's condition. What are the doctors doing for her? Is she on any treatment? She should be on pain killers - that will not put her to sleep. If she has mets that affect her walking, can radiation help?
I think you need to have the doctor take steps to alleviate your Mom's condition. I was also given a year - 21 months ago and I am fine. But I have had several radiation treatments, radio surgey and chemo for most of the 20 months. I feel fine and live normally.
If you need to, change doctors, but your Mom should not be in pain or asleep.
If her condition or her choice makes further treatment not reasonable, then I would look to Hospice care for some assistance.
Best wishes.
Mary