Femmes de personne (1984)

Cécile, a single mother, contrives to meet Gilquin, the married father of a classmate of her nearly-adolescent son. An affair ensues. Isabelle, approaching middle age with two children, discovers she's pregnant, goes into a funk, and arranges for a younger woman to seduce her husband. Adeline is distraught at her ex-lover's plan to leave France. The three women are colleagues at a radiology clinic. They come to each other's aid, but each must decide on her own what course to take: Cécile with Gilquin, Isabelle with her husband, and Adeline with her solitude.