During her husband's reign Euphrosyne did not intervene in the politics of the kingdom, but after his death on 31 May 1162, her influence strengthened over their son, King Stephen III.
Selama masa pemerintahan suaminya Euphrosyne tidak ikut campur di dalam politik kerajaan, namun setelah kematian suaminya pada tanggal 31 Mei 1162, pengaruhnya semakin kuat atas putra mereka, Raja István III.