in love with my brothers friend

this story is about a girl named Olivia Black. she is Sirius' twin sister. Olivia was put into gryffindoor house with her brother and the other Mauraders. this story starts in 6th year at hogwarts. Olivia has been like a Marauder since first year. she always new about Remus' little secret since 2nd year by accident, nobody knows that she is also Animagus. She has a very abusive boyfriend named Alex Zimmerman.

(This is my first time doing a story so don't come after me)