In the last years, she foiled the plot by one of Ienari's concubines Senkoin to have Yoshiyasu MAEDA whose mother was Yohime (her biological mother was Omiyonokata), a daughter of Ienari, become the next shogun, which was her last action that Midaidokoro should take.
晩年には、家斉側室の一人・専行院が家斉の娘・溶姫（母はお美代の方）を生母とする前田慶寧を次期将軍に擁立しようと企む陰謀を阻止するが、これが最後の御台所らしい行動であった。