Cappa grew up in a three-room apartment on Elizabeth Street, on the outer reaches of Manhattan's Little Italy, which was shared with 14 people, including boarders and relatives. In 1933, when she was working as a machinist in the nearby Garment District, she married Charles Scorsese, who also lived on Elizabeth Street and was also employed in the garment industry. The experience of growing up in Little Italy among first- and second-generation Italian Americans had a profound influence on her son Martin, who revisited their attitudes, values and way of life in his 1974 documentary, Italianamerican.