The Good Wizard Snape

Hermione Granger babysits Dudley Dursley's children as a favor for Harry. The only rule? Use no magic. Hermione takes them to the Black Sheep B&B in the non-magical town of Cokeworth. She signs the guestbook under the name Mrs. Snape. He can't mind? What happens when the dead headmaster returns and is unhappy with the mixup?