Oh, okay. [That was a little surprising and he looks confused.] But doesn't that break the law? Like how we're not meant to use magic outside of school.

[He digs in his pocket and finds the note Professor McGonagall gave him before he boarded the Hogwarts Express, handing it to Lily. She'd have seen one before but he was making a point. He also uses it to ignore her question. He didn't really have a favourite. Just a worst.]

I'll answer that after you tell me why you're asking. [He was still confused how she knew him so he wasn't going to rub in her face that he was dead if she didn't know.]