The Forbidden affairs *S.Black*

AU
What if James and Lily potter survived. What if Harry Potter wasn't an only child and has not only a twin sister but a younger troublesome sister. What if Sirius black never went to jail and the potters stayed with him for protection

It's the fourth year of hogwarts for twins skylar and Harry Potter neither of them are aware how it's all going to change. Harry has be entered it an deadly tournament as the dark lord is about to return as skylar is sleeping with Draco Malfoy and finds her head being turned by someone she shouldn't be turned by