 Other sources claim that she contracted syphilis from Al which caused each subsequent try for another child to end in miscarriage or stillbirth.While most Al Capone biographies say that Mae Capone was Sonny’s biological mother, according to Deirdre Capone, a great niece of Al Capone, Mae Capone was not Sonny’s biological mother.Sonny’s real mother had passed away in childbirth and Al’s mother, Teresa, had arranged for Mae’s and Al’s wedding so that Sonny would have a mother growing up.