The Werewolf Contract: I Replace the True Luna

To avenge her parents, Scarlett makes a wish to the Moon Goddess to shapeshift into her enemy, Mabel. She takes Mabel's place as the mate of Arthur, the Wolf King, but falls in love with him along the way. When her true identity is revealed, Arthur chooses to accept her as she really is; after successfully exacting her revenge, Scarlett chooses to walk away from power and retire into seclusion with her beloved.