Well, we’ve had some surprising progress (by accident) between Aspen and Mitzy…
Aspen (although not a lap cat) likes to curl up on the back of my chair, while Mitzy generally curls up either in my lap, or – if I’m on the computer – right next to me, between my hip and the arm of my chair.
However, this evening, Mitzy had claimed the back of the chair before I even sat down in it. So when Aspen came up, wanting to settle up there with me, she found Mitzy already there, and ready to snap at her.
Finally, Mitzy, turned around to face the other side of the room, and ended up leaving just enough space for Aspen to jump up. It took a few minutes of disagreement and snapping at each other, but they’re currently both curled up there. Not really curled up together, just right next to each other, but it’s definitely progress in their relationship.
Edit at 11:55pm: Wow! Mitzy just turned around and laid her head against Aspen’s side! So I change my above statement – now they are curled up together!