Revenge On My Ex; His Rival And I

One night, Sandra discovered that her husband and her own sister had been sleeping with each other, and neither of them felt any remorse for their actions. To worsen it all, he divorced her and married her sister just three months after she caught them. On the night of their wedding, a mysterious man appeared before her, claiming to know her and telling her that he was willing to help her get her revenge. All she needed to do was marry him and become the wife of one of the most powerful men in the country. Now, she’s remarried to the billionaire business tycoon, Leonard Mancini, and she couldn't wait to make life a living hell for those who betrayed her. But what happened when she discovered that even Leonard had a secret he’s hiding from her? A secret that made her marry Henry, her ex husband? A secret that can cost her her sanity?