A few years after the death of her husband, 40-something Louisa runs into Charles, an old flame, who is back in Paris. They rekindle their affair, but the transition from passionate sex to a stable relationship, following Louisa’s unplanned pregnancy, and from the memory of youthful carelessness to middle-age responsibility, is more challenging than both expected. My Shortest Love Affair, the third feature of French-Jewish director Karin Albou, who also stars, is a charming and frank drama about relationships, sex and starting over.