Carla Bruni-Sarkozy has been branded a 'prostitute' by Iran after she publicly attacked the country for threatening to stone a woman to death. France's First Lady is part of a campaign to save the life of Sakineh Mohammadi-Ashtiani, a 43-year-old mother of two. She is accused of cheating on her husband and then helping to kill him, and is now facing capital punishment for her crimes. Ms Bruni-Sarkozy, who became President Nicolas Sarkozy's third wife two years ago, has signed a petition calling for Sakineh's release.