The Princess's Revenge

Princess Seraphina Sinclair marries Julian Gideon and helps him rise to Vice Minister of Revenue. She is unaware that he is secretly giving her a sterility potion, keeping a mistress, and plotting with his mistress to demote her to a concubine. Seraphina divorces her husband, reclaims assets, and brings him and his mistress to ruin, leading to the execution of their clans. She finds happily ever after with Hector Shaw, who truly saved her.