Gloria didn't wan't to lose completely her humanity. So she decided to have a humanoid wolf form. She remembered that werewolves always chaned back when there wasn't a full moon. So she had to decide which type of werewolf she is going to be.
She could be the common werewolf: living has a human and changing into werewolt on full moon nights.
She could bee an eternal werewolf: being werewolf all the time, never changing back into human.
Or she could be a reversal werewolf: she lives as a werewolf and changes into a human on full moon nights.
she chooses...