Substitute for Concubine

In her previous life, she was poor all her life. After her father died in a car accident, her mother hurriedly remarried. For the sake of her sister, she gave up going to school. But all she sacrificed for her future was her sister's betrayal. When she learned that she was terminally ill, committed suicide, and had her soul leave her body, she realized that her death sentence was just her sister's escape plan. In this life, as a saint, she should have had kind parents and a happy family, but fate still played a huge joke on her, and she survived with the whole family's efforts. But he had to accept the humble life of being trampled on the ground. When she learned that her cousin had been chosen to marry, she had to step forward again and go to a strange country in her stead. Jun? Minister? Husband? Lady? She was just a pawn in his hands. When two sedan chairs were carried into the prince's palace at the same time, even though she was a saint, she had to share the same man with another woman. How can we escape from this manipulated life? When the contract was finalized, she did not get real relief, but only gained the other party's interested attention.