We have given Kitty away to one of Cissy's co-workers.

This is probably a more momentous event for us than it is for Kitty. Her new family already has another cat, and will certainly provide her with a nice home. If anything, one has to worry for them, or the other cat, in case Kitty misbehaves and turns into a house-wrecker. If that happens, we will have her back in a week or so. If not, we will go visit them sometime later. Not sure, which outcome I prefer.