I think the Tiber has been crossed in Kittyland. Thatch still seems unsure if I'm friend or foe: I bring him food, pet him, play games with him, and keep his litter clean, but I also bring this terrifying Dust Buster into his cage to vacuum and keep him locked up.
However, that said, I believe that like me, he has fallen in love with Annabelle. This morning she was sitting on my computer table with me, and I could see him stretching out his paw through the bars of the door to reach her, Later, he was at the door trying to get her attention so I carried her over and they sniffed each other's faces with no sign of hostility.