The Surrogate Woman

During Joseon Dynasty, Shin Sang Gyu of noble birth and his wife Yun are concerned that they have no child to succeed the family name. Sang Gyu's mother and uncle Shin Chi Ho bring Ok Nyeo to have her be a surrogate mother. On their first night together, Sang Gyu falls for Ok Nyeo's beauty and his wife becomes jealous. Ok Nyeo falls for him as well so her mother tries to persuade her to see the reality but in vain. Ok Nyeo gives birth to a son whom she has to give to Yun's arms. Ok Nyeo defies her misfortune with her own death.
(Source: KMDb)