Petunia never married Vernon and never had Dudley. When she finds Hailey Potter on her doorstep, she's ecstatic since she has always wanted a daughter.
Because of past experiences, Petunia has convinced herself that the only way to gain men's interest is to always be willing and eager to have sex with them and she teaches this to Hailey.
Petunia's teachings paired up with her precocious body development that has the unexpected consequence of leaving her body in a perpetual state of arousal, turn Hailey into a girl obssessed with boys and sex, and happy to sleep with every guy she finds attractive.
When the Hogwarts letter arrives, Hailey is thrown into a very strange world where everybody there knows her name and has very set ideas on how she should be and how she should behave. They expect her to be the hero but all she has ever known is how to be a slut.
At Hogwarts she will learn not only magic but also that she can use sex to her advantage.
WARNINGS: Female Harry Potter, Underage Sex, Extremely Underage Sex(13 years old), Slut Harry, Slytherin Harry, Horny Harry, Extremely Precocious Harry, Very OOC Harry, Very OOC Petunia, Smart Harry, Powerful Harry, Porn w/o Plot, Alternate Universe - Canon, Brainwashing, Loss of Virginity, Promiscuity, Exhibitionism.