story had a teen who is a werewolf but does not turn until he doesn't
take his pills while taking his younger sister trick-or-treating. It
turns out that all his friends are weres and he is their pack alpha,
even though he had no clue he was a were. At the end he ends up
fighting the alpha of another pack who kidnapped his little sister,
normal girlfriend, and submissive wolf slave girl.
Thanks in advance for helping