Vitača married Ostoja, the illegitimate son of King Tvrtko I of Bosnia, before his accession to the throne of Bosnia. Ostoja was a member of the Bosnian Church and Vitača was most likely a member of that church as well.[3] It is unknown whether they had any children.
Vitača became queen when her husband was elected to succeed Jelena Gruba in 1399.[4] Vitača, however, was not related to the powerful nobility of Bosnia - in fact, she may have been a commoner.[1] Ostoja divorced her, either by his own choice, or due to the pressure to make a useful political marriage.[4] He was able to do this because, unlike Roman Catholic churches, the Bosnian Church permitted divorce.[1]
Though, Ostoja referred to her as his wife in a letter he wrote to the people of Dubrovnik, dated February of 1399, by September of 1399 the Ragusans referred to Vitača as the repudiated wife of the King of Bosnia.[5] The Ragusans kept correspondence with the ex-queen Vitača for some time after her divorce.
Following his divorce from Vitača, Ostoja married Kujava Radinović, who, sixteen years later, he divorced in turn.[1]
John Van Antwerp Fine, Bosnian Institute; The Bosnian Church: Its Place in State and Society from the Thirteenth to the Fifteenth Century, Saqi in association with The Bosnian Institute, 2007