[2][6] She had an affair with the impetuous Julian of Sidon (d. 1275), and her "notorious lack of chastity"[7] (possibly) prompted the official letter Audi filia et from Pope Clement IV, urging her to marry.
[11] King Hugh III of Cyprus wanted to use Isabella's status as a wealthy heiress to choose a new husband for her, to attract another distinguished knight to the fight in the Holy Land.
Hugh forcibly took Isabella to Cyprus to arrange a new marriage, leaving her mother Alice de la Roche as regent of Beirut.
[14] The High Court ruled in favor of Baibars, and Mamluk guards were assigned to Isabella's protection.
[1] Isabella was not known to have had any children, and upon her death in 1282 at the age of 30, the lordship of Beirut passed to her younger sister Eschiva (1253–1312).