That cat must `ve liked your house that much.
I think it liked my cats food bowl better.
There was a program (on the BBC maybe?) about cats where one cat would just go sleep with some neighbor guy every day.
There's been a few of them on different channels, but I think the BBC did one which was a study of cats living in a certain area, (where did they disappear to in their adventures from home etc). I know my wife has watched them all.