There aren't really any words of comfort that don't sound trite in situations like this.
Just... know that inside you have the strength to cope, Cindy, even if it doesn't feel like it sometimes. And whatever strength I have, I give to you freely. Hang in there honey. Be there for her when you can and let her know that you love her.
I can't even begin to imagine how heart-wrenching this must be for both of you.
*extra big hug*
I... don't know what else to say. I'm so sorry either of you have to face this.