[1][4] The exact reason for this remarriage is unknown: According to The Secret History of the Mongols, Genghis Khan gave Ibaqa to Jürchedei as a reward for his service in wounding Nilga Senggum in 1203 and, later, in killing Jakha Gambhu.
[1] Conversely, Rashid al-Din in Jami' al-tawarikh claims that Genghis Khan divorced Ibaqa due to a nightmare in which God commanded him to give her away immediately, and Jürchedei happened to be guarding the tent.
[1] Regardless of the rationale, Genghis Khan allowed Ibaqa to keep her title as Khatun even in her remarriage, and asked that she leave him a token of her dowry by which he could remember her.
[1] When Ögedei Khan, Ibaqa's former step-son, died on 11 December, 1241, likely from alcohol poisoning or organ failure after a drunken party the night before, Ibaqa, along with Al Altan, the youngest daughter of Genghis Khan's chief wife, Börte, were each suspected of poisoning Ögedei.
[6] Ibaqa was cleared after a well-respected Jalayir general, who was loyal to the Ögedeyids, Eljigidei, protested that the women were innocent because Ögedei's alcoholism was too well known for poison to be believable as his killer.