Having separated from the group beforehand in hopes to find himself some snacks he might steal from the kitchen elves, Peter sadly returned to the dorms empty-handed.

He caught sight of Remus entering the dormitory before him. Believing that the others have returned from their short trip, he followed, he instead finds there to be an infant in your arms.

"Did you guys have a baby without me?" much unlike Remus' fearful reaction to the baby, Peter was simply dejected that he was left out.