Minerva makes a difference

Professor Minerva McGonagall had been asked by her favourite student, Lily, to watch her sister's home if anything was to happen to them as she feared that the headmaster was planning something for her son. After seeing the Dursleys, Minerva knew she couldn't allow the headmaster to condemn Lily's son to ten dark and difficult years. And that changes Everything! HHr MOF Dumbledore