[Mal knows enough about people to know when they're not okay. Hell, he's the king of dodging questions. And unless they're a member of his crew, he really doesn't care about it. Even if they're members of his crew, as long as it ain't affectin' the work, he might not say anything. Unless it's Kaylee.
But he doesn't have a crew here. Aidan sort of, but not really. Not after Aidan's kids showed up. Mal calls Nico's bluff.]
Shiny enough you can't look me in the eye. What's eatin' at you?