Who Says I Want To Be Adopted? (1D Fan fic)

Erin was adopted by the Horan family, she was kind of close to her brother, Niall, but when he goes away to the X Factors, Six weeks in his parents are murdered. When the policed called Niall to see if he was related anyway to Erin he said no, completely forgetting his own adopted sister. Now she is in a girl group that is now famous, and when they go on tour with the one and only One Direction, well… you’ll see…