In 1941, Aimone was proposed to be King of Croatia, he would be crowned as Tomislav II. But Aimone was not at all interested in this new Throne, so the projet falled through.
About 1942, when germans occuped Italy, the Duke could escape to the allied area, but Irene was trapped in german territory, ....she was arrested, this same year, Amadeo, their only son was born.
Later, Irene and little Amadeo were sent first to Sartirana, near Pavía, and then to Hirschepg in Germany, during 10 months they lived precouriously.
In May 1945, they were finally liberated. Mother and son stayed in their home in Firenze, but in 1946, the fall of the italian Monarchie obliged them to scape to Seitzerland. During this period Aimone could scape to Argentina. He died there in january 1948.
Irene continued in Switzerland, alone and widow, with a little son. Later she could finally return to Italy, where the italian Republic returned to the Aosta´s Family all their propertys.
She established herself in Villa Domenico (Fiesole), near her sister Helena, who lived in Villa Sparta. She died there in april 1974. She is buried in Arezzo, in "Il Borro" one of the Aosta´s propertys