She was also the lover of Giuseppe Mazzini for a period and operated a salon in Turin for Italian expatriates.
Giuditta Bellerio was born in 1804 in Milan, the daughter of a magistrate of the Napoleonic Kingdom of Italy.
Following a revolution in 1820-1821, Giovanni Sidoli was forced to flee to Switzerland, and was later joined by Giuditta after she gave birth to a daughter.
In 1832, Giuditta settled with her brother in Marseille, running her apartment as a haven for Italian revolutionary exiles.
Giuditta gave birth to a son named Joseph Aristide while in Marseilles, almost certainly fathered by Mazzini.