She was attached to the Partisan Supreme Headquarters as one of the most prominent women fighters and served as personal secretary to communist leader Josip Broz Tito throughout the Second World War.
At the same time, her father Momčilo Ninčić was senior minister in the opposing Yugoslav Royal government in-exile in London.
After the birth of her child she had to leave the infant with her husband's parents in Mostar and join partisans at Tito's GHQ where her fluency in the English language was very much needed.
[1] She worked with Dr Ian Mackenzie of the RAMC, William Deakin, Fitzroy Maclean, and other Anglo-American representatives throughout their stay in the Balkans.
[1][2] In August 1944, together with Vladimir Velebit and Maclean, she flew to Naples and assisted Tito during numerous meetings with Winston Churchill at Caserta.