Factual error: When Serafine turns into a werewolf, her knees bend backward and turn into hocks (the equivalent of the human ankle). And her upper leg bones bend forward to become stifles (the equivalent of the human knee. Since wolves and humans have very similar leg structure, there would be no need for her joints to do this. All that would really be needed is a lengthening of her bones from her ankles downward. Instead, she now has an extra set of joints in her leg.