I didn't understand why the girl became a prostitute once they got back home.
Everybody's good-looking in this movie. The girl's step-father's good-looking in a scruffy French sort of way. She has sex with a couple of good-looking old guys. After an unfortunate incident, police go to her mother with proof of what she's been doing. Because of her age, she's a victim, not a perpetrator. She's grounded and has to see a psychologist, but she sulks through the rest of the movie because her mother won't let her be a prostitute.
The psychologist smiles too much and offers no insight as to why the girl would do this.
There's a lot of sex and nudity.
And then you have Charlotte Rampling's character, a good-looking old rich French woman who says that she wishes she had been a prostitute when she was young. What is wrong with these people? First of all, Charlotte could still find plenty of work as a prostitute if she wanted to. Watch the movie Barfly if you want to see what prostitutes look like. Being "young and beautiful" is not a requirement.
With Marine Vacth, Fatin Ravat and Geraldine Paihas among others.