When the lawyer explains to Filumena that he'll easily win the case, she accepts the failure of her ruse, but tells Domenico that one of the three young men is actually his child, then leaves him.
Filumena Marturano initially was written as a tribute to Eduardo's sister Titina De Filippo, a famous Neapolitan theatrical actress, who took the title role in the first production in Naples in 1946.
Despite the strong connection between Titina De Filippo and the role in the mind of the Italian public, another actress, Regina Bianchi, was able to achieve cult status as Filumena in subsequent years.
In 1977, an English-language translation by Keith Waterhouse and Willis Hall was produced at the Lyric Theatre in London, directed by Franco Zeffirelli and starring Colin Blakely and Joan Plowright.
In 1950, Eduardo De Filippo directed Filomena Marturano, an Argentine, Spanish-language film of the play, in which he starred as Domenico alongside his sister Titina.
In 1964, another screen version was directed by Vittorio De Sica, titled Matrimonio all'italiana (Marriage Italian Style), starring Sophia Loren and Marcello Mastroianni.