Is my step mom a jerk?

Shes been acting super passive aggressive lately and idk what triggered it.. ?

She didnt have to throw the jab of her saying she "feels like I'm inconsiderate." Sitting in a chair isnt inconsiderate, I didnt even move any of her stuff around. And I didn't even know she didn't want people sitting in it? She didnt call dibs on it or anything. She makes up all of these controlling/restrictive rules just for me that no one else has to follow.

Im moving out next week. Was it ok for my dad to say that??

I know I was a little rude but i was rude AFTER she was. She constantly says snobby comments like this and im just tired of taking it.