Lulu
We know. And I have. He'll get over it soon. He always does. I'm not sure I've ever seen him mad longer than about half an hour.
Knowing my brother as I do, my lady, it's entirely possible that he may acquire a kitten somewhere now that the idea's in his head. Khajiit do often live with domestic cats, they simple loathe the idea of calling them pets, or buying and selling them as common livestock. Housemates, yes.
I wouldn't be surprised if Robin showed up with some flea-ridden alley stray sooner or later. I would advise you to have little to do with it, though. For my part, it would feel odd to accept a feline pet in any way other than as a companion of Robin's. It is generous and kind of you to offer. I know your intentions were good. If you really want to give him something, though, send something sweet over. Khajiit have an insatiable appetite for sugary things.