When angry, Ginny rarely was in touch with her sense of guilt, that all came flooding later so when Parvati began making her exit she didn't feel guilty at all. In fact, she only felt more incensed when George pulled her closer. "And since when has Parvati been your girl?"
George really wasn't helping the situation and as she put her bag down she flung her hands up. "Oh well that makes it all better then! That you were purposefully keeping things from me, you're right. All better. Everything is just bloody fine." Okay, so she was acting childish but being the baby of the family had to have some perks, didn't it?
With a huff she turned "I'm going to my room, don't make too much noise, will you?" she said before storming off. In her defense, she managed not to slam the door behind her.