"This doesn't have anything to do with my parents or what they think of you!" she reiterated. "Why are you trying to make this into something that it's not? And ask you? What do you mean ask you?" Maybe her permission slip remark hadn't been so far off. "Is that really something that I need your authority on? For you to say yes, I can go or no, I can't?" Because Hermione did not like that idea. She was all for following rules, but she wasn't very fond of being told what she could and could not do.
"No," she said stubbornly, when he told her to go back inside; she wasn't paying the slightest bit of attention to the cold. "And I just told you, I'm not going."