[Nagito is still smiling like this, but it's different--not as soft as when he'd been talking about Hajime. It's especially clear in a moment like this that Nagito has trained himself to smile as a default expression.]

Ah, I guess I shouldn't lie and say you're wrong, should I? [Nagito would absolutely take advantage of a situation like this. And he knows Need could have prodded at much worse.] But I'd appreciate if you didn't gossip to everyone else, regardless!

[Not that Need seems like the type.]