Now that that was out, Peter calmed a bit. Though he was visibly shaking. But he usually did that anyway - stupid tick he couldn't control. But, he was proud to note that in that last line he hadn't stuttered at all. Apparently that's what it took for him to speak clearly. It took a moment for him to process everything Remus had said.
Peter folded his arms across his chest. This was...not what he expected. But he did want his friends to be happy, right? Plus, he liked the idea that Remus would keep Sirius occupied. Plus, he was relieved that nothing had been going on when they still were at Hogwarts.
He looked up at Remus with a bit of a scowl pulling at his lips. He fought to remain serious. "If-If either of you crawl over m-my bed to g-get to one another I..I swear I'll hex you," he said.