What bugs me about this is that IT IS YOUR HOME! Could he have asked you? Consulted you?
It's your right to wear your Hello Kitty pajamas in your home. Also not to have to be alone in a small space with a stranger.
This is so bizarre to me and just another example (to ME, maybe I am bitter) of how the A's needs can take over a full household and everyone's just expected to take it.
I think I have been away from living-with-an-A too long to think this sounds at all bearable.