After her husband was captured by troops of Nur ad-Din, the atabeg (or governor) of Aleppo in May 1150, Beatrice became regent in the absence of her spouse.
[1] After William perished in a battle in 1132 or 1133, Beatrice became a wealthy widow because she could retain her dower possessions—the castle of Saone[2]—till the end of her life.
[6] Joscelin preferred to live in Turbessel, west of the river Euphrates, and charged mercenaries with the defence of Edessa.
[10][11] The Byzantine Emperor, Manuel I Komnenos, offered to pay an annual income to Beatrice and her children in return for the cession of the last fortresses of the county.
[14] She provisionally retained Qa'lat ar-Rum, but only to grant it to Grigor III Pahlavuni, the catholicos (or head) of the Armenian Church in Cilicia.