Professor's Daughter

A story of interhouse friendship and some extra help against Voldy. Erin is ready for her future at Hogwarts, since that means helping her best friend. What's the deal with Narcissa and Naomi? Why are they hiding their past? And why does the greasey haired Potions Master seem to hate Erin more then even Harry Potter? Disclaimer: I don't own Harry Potter, it's Characters, or places