Are you my mother now? I don't need annoying little girls to nag, whether or not they think it's very smart to get involved with me.

[yeah, he's also implying that she's pretty damn stupid for continuing this when he's telling her to bug off.]

Do you think I won't kill you just because you're cute? Things like that don't really matter to me. [which is exactly why he stands up to full height and places a hand on the hilt of his katana. he doesn't draw yet, but the expression in his eyes is hardened enough to indicate that he has every intention of backing up what he says.]