My Life As I Know It (a Harry Potter fan fiction)

Dahlia is starting her second year at Hogwarts academy along with her best friends Fred and George, Lee, and ... Harry Potter?! She's know Harry since they were kids and never knew that he would be a wizard and the biggest surprise... that they're brother and sister?! What kind of trouble would that bring along and how will Dahlia help her little brother through the trouble he will face? Read to find out!! ^_^