Well, even if kitty doesn't return, it spend a lovely warm night with you, and that deserves a "well done".
I must admit I'm a bit envious of the pics of your gorgeous kitties snuggling up with each other. Our longest-resident cat, Holly, dislikes all creatures except those which can fill her food bowl and scritch her behind the ears, so she never goes anywhere near Lucy and Lizzie. The latter two cats, despite being mother and daughter, barely tolerate lying close to each other. Snuggling is completely out of the question, because one will take a swipe at the other should they accidentally touch when sleeping next to each other. It's sad, really.