I remember you mentioning a while back that she was in the hospital, so my guess is that had something to do with it. While you're obviously devastated by this (as are we), what's important to remember is she's finally free from her suffering, and that you loved her.
Cap,
You have my deepest sympathy. We lost a very dear friend a few years ago. She was 43 and left her husband and 3 kids - 12, 15 and 17. Very sad indeed. You are in my thoughts and prayers.
OG
CC