Mated to my sister's ugly mate

Shadow’s mother insisted that she take her sister’s place and become the mate of the formidable Alpha, even though he was crippled and used a wheelchair. As a dutiful daughter, Shadow made the heartbreaking decision to sacrifice her own happiness for the sake of her family. However, her wedding night took an unexpected turn when she found herself trapped with her mate’s brother. "Take off your clothes now," he demanded. Shocked, Shadow stuttered, "But who are you? You’re not my mate." He lea