Leo,
I wish I knew what to say to console you, but there never seems to be enough or even the right things to say. Take comfort in the company of family and friends... they can help guide you through this just by being a shoulder for you to lean on. Try to take some solice, if you can, in the fact that she could have suffered intensely for a very long time with that dread disease. Her load was lightened in a short period... yours will with time.
Thoughts and prayers are with you,