[Admittedly, Carmen is not always the best when it comes to social interaction, which is one of the reasons why she's taken such an interest in Reid — she understands the feeling of not quite getting the nuances, or of being the odd one out in a crowd; the difference is that she's taken that and turned it to her own advantage, layering on confidence and bravado to help carry her through.

But the look that crosses Reid's face? That's an expression she can read all too clearly, particularly since it's one she's seen before. She already knows how his smile will look before it even appears, and she's not surprised by how it turns out when he does.

Something's haunting him, and he's arranging things to protect himself.

It's a look she's seen Coop wear altogether too often, too, but the difference there is that Cooper does it to try to protect everyone else, instead.]

It wouldn't be the first time. A favor, if you win.

[It's a good thing she's as competitive as she is, and as honorable. After a look like that, she'd almost be tempted to let him win just for the sake of seeing his concerns assuaged.]

But that won't do you much good, since you'll have to beat me first.