Woke Up to My Loyal Guard

A young woman of the Jensen family is forced into a substitute marriage, and the man she is married to is Nathan, once the loyal follower of the family's founding matriarch a hundred years ago. The bride's body is no longer occupied by the bride. The matriarch, dead for a century, has woken up inside it. She uses what she knows to help Nathan settle the infighting in his own household and take back the authority he lost, then turns to her own family and reasserts her standing as its head. The curse that killed her a hundred years ago has not let go of her, and she does not know who brought her back or why. Someone is working from a distance, and the matter of a secret method for prolonging life keeps drawing people toward her.