The Guide to Pranking (by Lily and Petunia Evans)
Status
Summary
Petunia Dursley's habit of searching for people's secrets merely stems from the fact that she has quite a few of her own. Her insecurity about the few that haunted her made her paranoid and itching to know everyone's while being privy to her own. After all, not many know about the pranks between herself and Lily in September of 1976. (hints of L/J).