Le Secret (2000)

On the surface Marie seems happy. She's been married to Francois for twelve years and they have a 2-year-old son, Paul, together. But the surface begins to crack when the couple fight over having a second child, Francois wants one but Marie doesn't. In the midst of this all, Marie meets Bill, a handsome 50-year-old expatriot. The two embark on a passionate love affair that has Marie torn. She doesn't want to pull her family apart, yet she finds herself unable to stop.