Valérie Bacot, whose lifetime of abuse at the hands of her husband shocked France, has been found guilty of his murder but told she can leave the court a free woman, reports the BBC.
She was given four years' jail, with three suspended, but released because of the year she had already served.
Bacot earlier collapsed in court when prosecutors called for her to be convicted but given clemency and freed.
She admitted killing her husband in March 2016 with his own gun.
Bacot, 40, described how she was abused from the age of 12 by Daniel Polette, first as her stepfather and then as her husband. For years Polette had forced her to prostitute herself with other men, but she finally snapped when he began talking about abusing their daughter.
More than 700,000 people signed a petition calling for her release.
As she left court a crowd of well-wishers applauded, to cries of "Bravo!". She told reporters her battle was not over.