Bodyswap Fun

When Sirius Black woke up with a view of his own body he couldn't figure out if he was still awake or asleep. But when Peter Pettigrew admits he performed a Bodyswap spell on James and Sirius for fun what will they do? Will James and Sirius be able to return to their own bodies? Or will they be stuck as they are? And most of all how will Remus their boyfriend react to the change.