The door opened, revealing an annoyed Petunia Dursley. Two things that Severus had noticed were constant with the Dursley family was that Petunia always opened the door, and the door was always answered within seven seconds. He thought it to be ironic. The Dursleys were the most ordinary muggles who hated wizards. Still, they always opened their door around the most potent magic number. This may have been a side effect of Albus’s magic used to protect Harry.