Together's a Crowd (2010)

Imagine, if you will, a somewhat contented married woman finding out her husband's infidelity during the celebration of a birthday party. That is what happens to Marie-France, when her husband, Henri, pulls out panties from his pocket to be used as a handkerchief. Marie-France becomes furious, storming out of the house. His son, Sebastian and his wife, Clementine, a struggling couple, decide to take Marie-France to their tiny apartment, something they feel it is a temporary arrangement. Little did they know what they were getting into...