My dear Hugh - I am so, so sorry for you. Like you, I was with my darling Veronica when she died and she was at last free of the debilitating condition that had stalked and slowly destroyed her for eleven years and 23 days. Believe me, there are sad, sad days ahead and unless you are a far stronger person that I am, you will never again feel whole - like me, and so many of us, the better half of you as been torn away. I can't offer any comfort - only understanding - take care of yourself as best you can - I know only too well that it will not be easy.
The only comfort that folk in our position can take of our tragedy is that at last our helpless loved one is now out of pain and torment.
All the very best
Mike