Their surprise almost makes him backpedal and apologise for a curse word he's fairly sure they... can't know. Not why they reacted, he registers a second later.

Lemm looks down expecting them to write, but their pen just hovers. He eyes it intently, as if staring will magically let him in on whatever inner debate they're having. Predictably it does not.

When they pull away he follows the motion with his eyes and then blinks back to their face. Doubtless they noticed that he noticed. Which means they will also be aware that not saying anything about that is a choice.

(...He's already fallen into the trap of overdoing it once today.)

"We'll have to be careful, I expect," Lemm says instead of anything he really wants to. "The things we say around the Moth. How they're said."