This brought tears to my eyes, because I had the same issue last year when Taz was sick.
There was a resident cat at the vet and I said.....If, God forbid, Taz doesn't make it, I will take him home.
I felt horrible that I was already thinking of taking in another cat when my heart cat was still with me. I still think of getting another cat when Taz's time with me is up. Because I can't imagine not having a cat. In fact, I just had that thought this morning while I was snuggling with Taz. And he is perfectly healthy now too.
I hope we are not bad for thinking this way.