Remus, despite his reluctance over this entire situation, could not help but watch, mesmerized, as Peter changed before his eyes. Tinier and tinier he became, sprouting hair, growing a tail (Wormtail, Remus noted absently, fondly).
It didn't look painful, but he knew the process to getting there must have been. And all that.. for him.
If the other three didn't already think him enough of a nancy, he would have enveloped them all in a hug.