my sister turn's out to be a vampire

LONG LOST TWIN SISTERS!
One mortal
One vampire
Mum human/ Dad vampire

New girl at school and she thinks its great before she reveals the truth!!
she has friends on the cheerleading squad- for real or fake?
She got a boy friend on the first day- for real or for fake
she found her long lost twin sister- or more?
Vampires and excitement!

what will happen!!!!???