 In 1940, during World War II, she joined the French Resistance after Fleg enlisted to the army and was killed during a military operation.In 1947, she married Samuel Zacks, a Canadian economist and art collector, whom she met during her stay in Switzerland.After marrying, the couple began to collect art items from the 19th century and the 20th century, mainly of French, Canadian and Israeli artists such as Gauguin, Rodin, Picasso, Henri Matisse, Kandinsky and Chagall.