The Ii family had no male heir, so Natora's uncle Ii Naomitsu tried to betrothe Ii Naochika his son to her so that he could inherit the clan. However, Naomitsu planned to rebel against Imagawa. Unidentified Imagawa clan retainers carried a report of the plans to Imagawa, who ordered Naomitsu and his son Naochika to commit seppuku.