During the latter's reign, she intervened in state affairs and wielded power, but was beheaded after Gwanghae's deposition from the throne.
At the time, it was acceptable for the next King take their father's former consort, with the exception of the primary wife and their own biological mother.
Despite her lowly background and status as a palace maid, Lady Kim wielded power to the extent that she worked with Yi Yi-cheom (이이첨) and Gwon Sin (권신).
[3] Her power even surpassed that of Queen Yu (중전 유씨), whom was Gwanghae's primary wife and leader of the Internal Court.
Later, on March 13, 1623, after King Injo was crowned following a rebellion led by Seoin faction (서인; 西人), Lady Kim was executed along with all of Gwanghae's people and supporters.