So, 3 days out from new cat addition. So far Cinnamon has done what all cats do when a new kitten is introduced; she hisses and bats at Kang. For his part, he is not intimidated. A true Klingon. Well, almost. He does not attack or antagonize. So on top of not being intimidated, he is smart.
The distance between them is shrinking, as well as an equivalent reduction in hissing and growling by Cinnamon. I expect that eventually they will be sleeping together on my bed.
Usually it is Cinnamon who sleeps on my bed, both when I am in it and when I am gone. However, Kang quickly asserted dominion over the bed, possibly extending what might have only been a two day bitch session into a week. Still, things are progressing nicely.
Of course, as I expected, Cinnamon is not eating as much. It is what she does when she gets upset. That too will change.