Michaeldied in 1081 and was succeeded as king by Constantine. Queen Jaquinta was a "powerful force and significant influence"; the Chronicle of the Priest of Duklja portrays her as the power behind the throne. She saw Michael's nephew Branislav as a threat to her husband and children. Her sons were young and thus in a weak position; Jaquinta feared that if Constantine died before they reached majority, Branislav would usurp the throne. She urged her husband to imprison him, and the opportunity was seized when Branislav arrived to the capital Skadar unattended with his brother and son. Branislav died soon after, but six of his brothers and six of his sons were still at liberty. They were granted asylum by the Republic of Ragusa. After Ragusa refused to expel them, Constantine started a siege ofthe city, during which a favourite of the queen was killed. Enraged, she convinced her husband to have Branislav's imprisoned brother and son beheaded before the city walls; church authorities eventually mediated peace, but Branislav's exiled family continued to seek revenge.
Succession crisis
By the time her husband died 1101, Queen Jaquinta was the most hated member of the feudingroyal family. A war of succession ensued, with the dowager fighting for her minor son Michael against Constantine's four half-brothers. Jaquinta's nephew Vladimir prevailed in 1103, but she continued to intrigue on behalf of her progeny, this time George. In 1118, in Kotor, she gave Vladimir a dose of a slow-working poison. The dying King was taken to Skadar, where she followed him in order to make sure of her son's accession. There Jaquinta accused her brother-in-law Dobroslav, deposed and imprisoned during the 1101–03 succession crisis. Unconvinced, Vladimir expelled her from Skadar. Jaquinta expected Dobroslav to be released and restored to the throne following Vladimir's imminent death. Thus, as soon as the king was dead, Jaquinta had her henchmenenter the jail and castrate and blind Dobroslav, who was then sent to a Skadar monastery. After George's accession, many pro-Byzantine members of the royal family fled to Dyrrachium. They soon returned in the company of a Byzantine army which ousted George and captured Jaquinta. She was taken to Constantinople, where she died imprisoned.