The Heir to Prince Manor

When Harry wakes one morning, he discovers a badly injured Snape in his living room, and tries to hide him. But Petunia discovers them and reveals a secret she has kept for thirteen years--one that will change the course of Harry's life forever, and Severus's as well. AU, pre-GOF. This story is part of the series, Prince Manor. The next story in the series is Return to Prince Manor.