Revenge Reborn: The Redgent's Forbidden Consort

In a great house, a widow who has an heir can hold the house herself. Beyond that, in this world a person can be sent back to live her life a second time, remembering the first. Lydia Sterling is the one sent back. The first time through, her husband and his mistress worked together against her. They arranged things so that she never had a child, cheated her out of her family's fortune, and left her in ruin. On her return she remembers all of it. She finds a poor scholar and pays him a large sum to father a child with her, and her plan runs from there: once the heir exists she will make herself a widow and take control of the Zane family. The scholar is the Prince Regent, the man people call the Living King of Hell, and he had set his sights on Lydia long before she came to him, with plans of his own. Lydia, now pregnant by the most powerful man there is, moves against her husband and his whole clan and starts taking their fortune for herself.