In “The Godfather Trilogy”, they did show a brief scene of Jack Woltz’s (John Marley) girlfriend that he kept at his mansion, who looked to be perhaps anywhere from 10-14, that Tom Hagen spotted.
The little girl Tom Hagen sees as he makes a hasty departure from Woltz’s mansion, her make-up smudged and her hair and clothes disheveled, was most likely a composite of many very young girls used by these people . . . with the permission of their parents. Most are probably unknowns. A few are household names.