이이
After her death, Yi Wonsu didn't marry Kwon but broke his wife’s promise by bringing her to live with him and his children, causing conflict with Yi I. Unlike Shin Saimdang who was a gentle and caring mother, Kwon liked to drink. Shin Saimdang's children suffered because of Kwon, and Yi I ran away from home. It is unclear why Yi Won-su made the unreasonable move to bring in Kwon, but it is also believed that it was caused by jealousy and inferiority towards his wife, Shin Saimdang.