I think she’s Asperger-y. I have a SIL who drove me crazy for years . . . she would *seem* like she was interacting with you normally, then say something that revealed she simply didn’t understand normal human interaction. I finally compared SIL with Asperger’s traits and said bingo! That made it a lot easier to deal with SIL once I could see she simply doesn’t understand things in a normal way.
I see the same thing with Her Thighness, except the evil end of the spectrum. She doesn’t understand normal human interaction, AND in addition, we should all bow down to her because SHE KNOWS BEST. So there.
You are probably correct. Asperger Syndrome folks often have very social interactions. They do not recognize normal personal boundaries. Many of them exhibit an unusual laugh.