I am sending all my best wishes, somehow these things tend to move out of our hands. But the one thing I know is what ever happens Willow is loved so very much and your choice will be out of love.
With Ollie who was 13 when the vet found a growth in his throat and she felt surgery was not fair on him - so we brought him home and had two wonderful years, yes with some ups and downs but never the less he was loved and content. We also managed two wonderful Ollie Hols in UK. Weird how things turn out now it his Mum who finds herself in a similar position.
Take care of yourself Bob and my love to Willow.