"Of course I'm in, I didn't think I needed to say that," Peter told James. Really, he couldn't win with these guys; if he said something then it was just stating the obvious, and if he didn't, that was just so suspicious.
Peter quietly stepped over to Sirius and caught at one of his flailing arms in an attempt to get him to stop nearly punching poor Remus. "We know they're going to be idiots, so there's no reason to get angry with them. It'll just make the whole thing even more stressful than it needs to be."