I think today I saw my first bit of sibling rivalry. Annabelle was sleeping in her new favorite place, my computer chair, when Thatch climbed onto my bed where I was napping, lay down on my chest, and fell asleep. As soon as he was comfortable, Annabelle climbed on the bed, walked all over him until he retreated to the cat tree, then curled up on my lap and stayed there for the next hour.