She later lived in Biwadono of the estate she inherited from Emperor Sanjo with her only daughter, in April 1027, Imperial Princess Teishi and observed Imperial Princess Teishi to go under Judai (imperial marriage) to Togu Imperial Prince Atsunaga (later became Emperor Gosuzaku) and died of illness within half a year.
その後妍子は一人娘禎子内親王と共に三条天皇から伝領した枇杷殿に住み、万寿4年（1027年）3月に禎子内親王が東宮敦良親王（のちの後朱雀天皇）に入内するのを見届けて、その半年後に病で崩じた。