Bad at love

We all know the story of Harry Potter, he was the boy who lived. But what if the boy who lived had a sister?
Fallon Potter is Harry's twin sister, she was with Harry on the night Voldemort tried to kill him-tried to kill them both, only nobody knew lily was to have twins, not even James knew. When Hagrid found Harry, he didn't know what to do with Fallon, so he dropped her off at a muggle hospital and gave Harry to his aunt and uncle.
Dumbledore just found Fallon, after 16 years and he brought her to Hogwarts. Now along with her brother and many future friends, Fallon meets Draco Malfoy.
Draco and Harry are sworn enemies, so even the thought of Fallon should be horrible to Draco, but he can't help but think of her. She is a slytherin of course.
Draco and Fallon's forbidden love story is only part of the problem, just wait until they find out that Voldemort is planning to kill both of the Potters.

This story is mature and has a few major changes from the actual story line!!