A Tail of Two Kittehs

Mouser's nemesis paid some visits over the last couple of days. They seem to tolerate each other, no hairs standing upright, no claws extended. They've been checking each other out from a distance (2 meters).
Today Bonny (which I presume is his name) darted out of the bushes when I wanted to sit in the garden. I fetched Mouser to see its reaction.
Velvet Claws stayed in the veranda. Bonny stayed outside the veranda.
It looked a lot like the mirror-act mime actors perform.