They've felt very defensive in private. Quick to situate themselves as under attack, or unfairly interrogated. They also mentioned that they didn't see how they could offer me any insight, being in the clue. That struck me as odd seeing as how if they were children, they ought to be looking at you and Peridot as a fifty-fifty shot. Saying something like that drives home that they're no more suspicious than you two... makes it sound like they have a reason to suspect themselves.