Who is Dominetta Vitali (Domino) from Thunderball and what is their importance?

Domino is James Bond's love interest in the story. She is Largo's mistress, and she is the sister of Giuseppe Petacchi, the pilot who steals the plane containing the nuclear bombs. Domino earns her keep by using her body. Bond recoils from calling her a prostitute, but he recognizes she uses her body to survive. Domino, however, grows distant from Largo. This allows her to act as a weapon for Bond against her lover.