Mausolée pour une garce (2001)

Agnes Taride has a closet full of skeletons. A beautiful woman accustomed to using her body to get what she wants, she persuades her lover to murder her ex-husband for the life-insurance money that would otherwise go to her daughter when she reaches her upcoming 18th birthday. The murder attempt goes awry: not only does the ex survive, but a witness calls on his underworld connections to avenge the attack on his friend. From there, the plot and counterplot become more and more complicated, with blackmail, kidnapping, murder, seduction, and suicide on the agenda and a surprise twist in the ending. Adapted from the best-selling novel by Frederic Dard.