Accompanied by her younger son , Jelena immediately traveled to the court of their overlord , King Louis I of Hungary , to seek his consent to Tvrtko 's accession .
Widowed within a year , Jelena continued ruling on Tvrtko 's behalf alone .
Accompanied by Jelena 's younger son , Jelena immediately traveled to the court of their overlord , King Louis I of Hungary , to seek his consent Tvrtko Tvrtko 's accession .
Widowed within a year , Jelena continued ruling on Tvrtko 's behalf alone .