Lady Kim became Royal Consort Suk-ui (숙의; 淑儀) when she gave birth to Yi Jin in 1572, the King's eldest son.
She eventually became Royal Consort Gwi-in (귀인; 貴人) in 1575 when she gave birth to Yi Hon, Prince Gwanghae.
It is recorded that King Seonjo cared greatly for her and when she died due to a postpartum disease he mourned for her.
When her life was in jeopardy, she said that someone was cursing her and told her that she would die if King Seonjo did not investigate quickly.
After her son Gwanghaegun became King, she was posthumously appointed Queen Gongseong (공성왕후; 恭聖王后) while adding Jasukdanin (자숙단인; 慈淑端仁).