I'm so sorry to hear this, hon.
Keeping your Mom with a positive attitude is key to her recovery and beating the C. I attribute living this long to the positive 'tude I kept (and still keep) when I went through it. If you ever need a friendly shoulder from someone who understands, please feel free to PM me. I will keep your Mom, you and your family in my nightly prayers and please keep us updated on how she is doing.
If God brings you to it, He will bring you through it!