Crown Princess Sun of the Haeum Bong clan (Korean: 순빈 봉씨; Hanja: 純嬪 奉氏; 1414–after 1454) was the second wife of Munjong of Joseon.
[1] The court records of 1436 note that Crown Princess Sun apparently also sent surplus food from palace meals to her natal home, spied on people outside of her palace through a gap in the wall of the servants' toilet, and received a visit from her aunt's husband after her father's death without notifying the Crown Prince, which, they said, showed a lack of regard for the general good.
[3] Crown Princess Sun then told the court that she was intimate with So-ssang night and day, as well as with another servant called Dan-ji (단지), because it solved the fact that she slept alone.
[1] Upon hearing that his daughter-in-law had been intimate with a member of the nobi class, King Sejong consulted with various officials on demoting another of the Crown Prince's wives.
The decree for her dismissal, however, excluded any mention of her sleeping with her maid and focused instead on her sending palace supplies to her natal home and receiving visitors without her husband's knowledge.