Although along with the general Kim Chongsŏ, she attempted to strengthen royal authority, a coup led by her uncle, Yi Yu, Grand Prince Suyang ended with her brother's banishment.
Hearing of her illness, the new king Sejo of Joseon sent a servant to tend her, who Princess Gyeonghye used to send a message begging for Jeong to be restored, which was allowed.
[8] After Princess Gyeonghye gave birth to her son in 1456 in exile in Gwangju, Jeolla Province, the eunuch dressed the child in female clothes and took him to the court where he was raised.
Princess Gyeonghye was judged guilty by association, her rank was reduced to nobi serf (Hanja: 公女婢), and she was sent to the official royal convent, Jeongeobwon.
[10] On 27 December 1473, Princess Gyeonghye wrote a will; expressing her sorrow in not having her son married, describing her declining health, leaving her house in Jeongseon-bang, Hanyang and property in Tongjin (now Gimpo), Gyeonggi Province to him.
Towards the end of her will, she urges her son to build a shrine to his grandfather, perform ancestral rites in accordance with Confucian tradition, and to pass down the duty to his descendants.