Game of Four (Détrompez-vous) is a 2007 French comedy film directed by Bruno Dega.

They give appointments in hotels and have so far managed to avoid arousing the suspicions of their respective spouses, Lionel and Carole.

And falls on Lionel, she had met shortly before leaving school, their children being in the same class.

A detail then puts their chip ear, they even decorated the pen came from Seville, which had been offered by the husband and wife.

They eventually realize that Lisa and Thomas were in the same place at the same time.