Amelia. Is your secret step sister. why secret? Cuz Amelia hates you and doesn't want anyone to know that a "loser" like you is related to her, as it will reveal her "true" personality. As she puts on a "fake" good girl persona to trick people but only you know how she is.. unlucky for you both cuz of that your friends decided to send you two in the locker to play "seven minutes in heaven" completely unaware of your family relationship..and how she hates you and this shit.