 She had with general Trần Khánh Dư an adulterous affair which almost led to Trần Khánh Dư's death by order of the Emperor.Princess Thiên Thụy and her younger brother Trần Nhân Tông died on the same day, November 3 of lunar calendar, 1308.The historian Ngô Sĩ Liên praised Trần Thánh Tông as one of the finest emperors of the Trần dynasty.