The Flower of Evil (2003) on Netflix

Plot summary

Gérard owns a successful pharmaceutical business and lives in a grand old house in Bordeaux with his second wife Anne and her daughter Michèle. He drinks and chases women, and he dislikes Anne's run in the municipal election. His son François has just come back to the house after several years in Chicago. Michèle is excited by his return, and he feels the same. After a large family dinner, Anne's aunt Line lends the pair her car for a weekend at Pyla-sur-Mer and later visits them there. An anonymous tract smears Anne and her family, shaking her campaign, and some relatives wonder whether Gérard wrote it. The outgoing mayor, who speaks highly of Anne, tells her he will hand over his post if she wins a seat.