From NetFlix:

Ida Dalser (Giovanna Mezzogiorno) falls for young Benito Mussolini (Filippo Timi) in Milan and sells everything she has to help the future dictator fund his newspaper, Popolo d’Italia. But when World War I separates the newly wedded couple, Mussolini marries another woman. Ida demands to retain her rights as Mussolini’s wife and the mother of his son, but the Fascists have other plans for the dictator’s dark secret in this gripping biopic.

Start by reading the Wikipedia article on Ida Dalser because it makes certain details in the film a bit more clear. We will probably never know if Ida and Mussolini were legally married. But that is almost irrelevant in the fim which concentrates almost entirely on Ida’s obsessive view of her relationship with Mussolini. Her son and Mussolini have secondary parts. Both parts (son and father) are well-played by Filippo Timi.

See this film in a theatre if possible because it is essentially an art film that is devoted to striking scenes and images.

English subtitles accompany the Italian script which is fairly easy to understand.

I particularly enjoyed all the old film clips of WWII and especially the moronic rantings of Mussolini himself.