The Grand Tutor's Replacement Bride

Labeled the harbinger of calamity from birth, she was nameless, discarded, and hated by the kingdom. Yet, she moved through life, hoping to awaken her wolf and find her mate. It was her consolation, only to be slapped in the face with the brutal reality shortly after: she was wolfless and rejected by her mate for her twin sister, the darling of the kingdom. She awaited death, the brutal end of every Harbinger of Calamity who couldn't redeem themselves with a wolf or a mate. However, at the last minute, she was forced to take her twin sister's place, and become the bride of the Grand Preceptor/Tutor, an enigma who only left his legend but no face. Rumor said he was the oldest man in the kingdom, barely holding on to his last breath. "He is desperate for an heir," Her father, the Duke said, "Give him a child by all means. Everything he owns must belong to this family. If you can do that, I'll make sure you own land, properties, and titles." "Don't blame us for how we treated you all those years, it's your fault that you were born with a curse. So, don't let this opportunity to redeem yourself go." Her mother. "I could even take you as my concubine if you succeed," her ex-mate, the crown prince. But why is the man who was said to be old and feeble, and dying soon, looking younger and stronger than the crown prince himself? Why is the man who was said to be desperate for an heir telling her, "Put your clothes back on, you're not a vessel for my heir, you're my Luna."? And why does he look at her like she's the air he breathes? "We will make them pay," he kissed her tenderly.