When she was young, she fell in love with Yun Won-hyeong, the younger brother of Queen Munjeong, and became his concubine.
Lady Jeong soon became the influential concubine of Yun Won-hyeong, who himself was the maternal uncle of 13th King Myeongjong, and Chief State Councilor during 1563 to 1565.
After that, in the 8th year of King Myeongjong's reign, Queen Munjeong had made it a priority to make Jeong Nan-jeong her sister-in-law.
She became very close to her sister-in-law Queen Munjeong, and gained a good amount of wealth.
In 1565, after the death of the Queen, both Jeong and Yun were exiled from the capital and, unable to make a political comeback, both committed suicide by poison (Jeong first,[1] followed by her husband five days later[2]) This article about a Korean politician is a stub.