The Philosophers Stone

Trixie LeStrange figured out early that her family's choices would never be her own, she wouldn't marry another blood supremacist, she wouldn't murder, torture, maim, or commit multitudinous crimes all in the name of a ridiculous and incestuous concept she refuses to ascribe to. The problem is, she lives with them...
Being raised by the Malfoys after her parents went to Azkaban wasn't exactly conducive to trying not to turn out like her mother, but once she goes to Hogwarts and gets sorted into Griffindor, things seem to be going her way.
How long that'll last? Well I guess you'll have to read to find out.