"Yeah? Well, you should be."

She fully intends to make his life a lot harder, starting with making sure he can't get in her room.

"Because I'm not scared of you either. I'm annoyed." Understatement. "And when I'm annoyed, my actions make a tantrum look like a walk in the park. I warned you once that you don't want to underestimate me. I'm not going to warn you again."