An Iranian newspaper has called Carla Bruni, France's first lady, a "prostitute" after she attacked Iran's plan to stone a woman to death.
The president's wife is part of a campaign to save the life of 43-year-old mother of two, Sakineh Mohammadi Ashtiani.
Ashtiani is accused of cheating on her husband and then helping to kill him.
She is now facing capital punishment for her crimes.
France has urged the European Union to threaten new sanctions over the case.
There were marches in several French cities this weekend in support of Ashtiani.