A lonely married Chinese woman in Paris starts an affair with a womanizer musician.
The wife comes to Paris to attend the wedding of her best friend. Her husband will follow later. While walking around the city, she meets the musician playing violin in an underpass. She talks to him and they become closer in the following days because he happens to be a friend of the soon-to-be-wed couple.
The wife and the musician have sex/kiss at 21:07 (in bed), 29:14 and 45:04 (both in bathtub).
The wife's husband arrives in Paris. When he tries to fuck her in their hotel room, she rejects him, saying she's tired. She also rejects him when he asks her if he wants to come to Lyon for a business meeting. When he falls asleep, she leaves and goes to the musician's place. She already broke up with the musician because he caught her several times with other women but I guess she couldn't resist him. When she reaches his place, he finds him and her soon-to-be-married best friend fucking (1:09:50)!
At the end scene, the wife's best friend proceeds to marry her fiance.
Strategic nudity only.
(Spoilers!) Good drama. I really like the part where the wife caught the musician and her soon-to-be-married best friend having sex, but I wish the scene was done more erotically.
Archive.org (divided into two streams. The cheating scenes here are around half a minute early compared to the timings above, so adjust accordingly)