The first time Stiles dresses Caleb up in a ridiculous outfit Derek thinks it’s a joke. He comes home from work one day and is greeted by the sight of their newborn pup in a zebra onesie complete with ears and a tail.

Stiles is at the Hale house, lounging on the front stoop watching Isaac, Erica, and Boyd wrestle, when the baby comes running out of the woods. - Derek becomes instant father to a magically appearing baby and falls in love. Stiles can’t take the cute and worries Derek’s heart will break if he loses the kid.