It is tragic when young mothers get terminal cancer. I don't know what to do or say, but do continue to be her friend. When my late wife got seriously ill with cancer, many of our "friends" disappeared. She died at 38 and left me with two little girls to raise as best I could. Just be there for her and help her with things if she asks.

And while prayers did not heal my wife, I have since come to believe that God hears prayers and sometimes does heal those with cancer. Prayers can't hurt.