Petunia would have to be more vigilant if she truly wanted to squash it from him, and if she had to prevent his exposure to everything relating to it, she would do just that.
People always asked how Peter was sorted into Gryffindor, how he became an animagus, why the Marauders were his friends, why he betrayed them all. Well, this is the reason.
A single moment, a single action, can alter the course of destiny. For better or worse. In this case...well, the rat did deserve to get knocked unconscious, didn't he? Sirius sure thought so. A Prisoner of Azkaban AU.
Petunia takes her distaste for Lily's new world a step too far, but after a conversation with Severus, Lily pushes her doubts aside and refuses to allow her sister get the last word.
Five times the Marauders reminded Remus Lupin he wasn't alone...and the one time they couldn't.