Zabini has a sister?

Hermione Granger is worried as Ginny Weasley finds out that she is really Crystal Zabini, Blaise Zabini's twin sister. Ginny is told to keep it a secret, but how long can she keep it for. Lots of things can happen it the summer, but will everyone turn againts Crystal because of who she is, without anyone really knowing her? Strong language in futcher chapters. DRAMIONE.