Light's Friend, L's Sister (Death Note Fanfic)

Anyone ever heard L has a little sister, and she doesn't know it yet, but she is exactly like him. Well, she denies even being related to L, and tries to beat him at the punch, to find Kira. Soon she finds him and befriends him, but will she betray L for Light. Or will she end up betraying Lights trust for L, he own f...