Well, I took the cat to the vet today. She was sicker than I had originally thought. The vet agreed that the humane thing to do would be to put the poor old girl out of her misery.
I had a very strong suspicion this was going to be the end result, so I spent the better part of the day cuddling her, before we actually went to the vet.
She's been part of my family, long before I had a family. She came into my life as a kitten in 1998; I didn't meet my wife until 2005.
Patches filled all of our lives with love, cuddles, and "puddins". There's a gaping hole in my heart.