The Mate Game

What happens when a pack of werewolves see finding their mates as a game of position? Whoever finds their mate first gets to pick who is next to be in their pack, but what happens when the most disobedient pack member's sister comes back into town after looking for her real parents only to find that she really does have a pack? Who will claim her as their mate? Will she get claimed? What happens when this girl who grew up a nomad bombards this packs life?