Cousin, He Has a White Moonlight in His Heart

Han Yan, the orphan daughter of a small county magistrate, followed her mother to the capital to join her aunt, secretly hoping to marry him. However, he had a childhood sweetheart before him and a marriage contract from Prince Gong's palace later. Although in the end, by mistake, I was able to marry him. However, is Han Yan really lucky? The rest of his life is so long, can Han Yan get the happiness that a woman should have?