Thanks everyone, for the well wishes and prayers for my mom.
They first discovered the cancer in her lungs. After a second CT scan, we were told yesterday that there is another (large) mass on her colon.
She is 89 years old, and in frail health. She has Parkinson's Disease and Osteoporosis. She's lived a very full life - she is a Christian and believes that Heaven is waiting for her. She's my step-mom but has been married to my dad for 40 years. My birth mother died in an automobile accident when I was 5, so this woman is really the only mom I've known.
Between her and my dad, there are 11 children - I'm the youngest

Together they have 29 grandchildren, and I don't know how many great-granchildren she has.
So there's the biography
She is opting for no treatment. She's ready to "go home", and my dad is ready to let her go. We've not been given a timeframe yet.
Your prayers are so appreciated - especially for my dad. I can't imagine losing not just one, but TWO spouses in a lifetime. Pray for comfort and peace for him. He wants to take care of her at home as long as he can.
Again, thanks so much!