This is a very moving film. I think I found it more sad than some of the other reviewers. It's really about the decline of a marriage through the incompatibility of the couple.
The incompatibility is brought home to the woman by her class, education, style, grace and education. (The sophisticated one, played by Miou Miou is just extraordinary acting). In essence, the sophisticated woman causes the central woman (played by Isabelle Huppert) to realize that her husband is a dolt, and that they share far more than she and her husband. The wonderful thing about the movie is that though the husband is a boob, insensitive and sometimes prone to violent anger, there is no doubt that he slaves for his family, is very humble, and deeply loves his wife and his two daughters - no question about it.
We get to see his pain as his wife falls out of love for him, his sometimes violent jealousy of the woman who has made his wife see him differently, and his heartbreak. It's quite profound. Those who say it all ends happily were watching another movie!
I loved the periods, the costumes, the settings - from Paris on Liberation Day through the 1940s and 1950s. Although it's the daughter's story, we see much of how the couple earlier met, married and began their married life. You will love it - it's more fast-paced than many French movies, and wrenching.
