Cousin Cousine - Plot

Plot

Two cousins related by marriage, Marthe (Marie-Christine Barrault) and Ludovic (Victor Lanoux), meet at a family wedding for the first time. Marthe is the bride's daughter and Ludovic is the groom's nephew. After a raucous wedding reception with plenty of dancing and drinking, Marthe and Ludovic are left waiting for their respective spouses, Pascal (Guy Marchand) and Karine (Marie-France Pisier), who are off having sex. While they wait, they get to know each other: Marthe is a secretary and Ludovic is a dance instructor who changes his occupation every three years. Later they dance together, even after the lights are turned off. Eventually Pascal and Karine show up, slightly disheveled, and the couples part.

Ludovic meets Marthe for lunch and tells her that her husband is having an affair with his wife. Later Pascal shamelessly informs her that he's broken off all of his affairs and that from now on she will be the only one. When Marthe tells him she knows about Karine, he says he only had her "three times in the bushes."

Sometime later at a family gathering at Marthe's mother's house, Ludovic's daughter, Nelsa (Catherine Verlor), shows slides she took at the wedding—including compromising photos of Pascal and Karine. During the slide show, Martha's mother's new husband dies. At the funeral, Ludovic's father arrives and extends his condolences; he too lost his spouse recently. On the way back from the cemetery, Marthe and Ludovic get better acquainted, with Marthe revealing that she enjoys swimming and singing.

Later that week, Marthe and Ludovic meet for lunch, buy bathing suits, and going swimming in a public pool. They enjoy each other's company so much that they decide to take the rest of the day off together to go shopping and see a movie. Although their relationship is platonic, Pascal and Karine begin to grow jealous. Marthe and Ludovic playfully arrange to meet by chance at a restaurant with their respective families, to see how Pascal and Karine react. Later that week Marthe and Ludovic meet again at the swimming pool and acknowledge that their relationship is special and must remain that way, even if platonic.

At another family wedding, with Pascal and the groom's father fighting over a business deal gone wrong, Marthe and Ludovic decide to leave and spend the day together. They return to find a drunken Pascal harassing the guests, and soon they all leave the disastrous wedding and bring Pascal home. Marthe's mother and Ludovic's father develop a close friendship and plan to spend time at his vineyard. Marthe and Ludovic discuss their own relationship and decide that it is absurd to keep it platonic. For once they will do something for themselves, and not for their spouses and families.

That Saturday, Marthe and Ludovic meet and spend the day together in a hotel making love. They decide to keep the room for the night and order food in. The following morning they extend their stay another day, making love, exchanging recipes, bathing together, and simply enjoying each other's company.

In the coming days, Pascal reverts back to his philandering ways, Karine leaves Ludovic and then returns, and Marthe's mother and Ludovic's father discover they're not as compatible as they thought. Marthe and Ludovic's relationship, however, continues to grow in love. At a Christmas family gathering at Marthe's mother's house, Marthe and Ludovic lock themselves in a bedroom and make love throughout the evening while their families eat, drink, watch Midnight Mass, and exchange gifts. The couple finally emerge from the bedroom, say goodbye to their crazy families, and ride off into the night together.