Young & Beautiful (2013) online

Isabelle is on summer holidays with her family in the south of France. She decides to lose her virginity to a German boy called Felix, but the experience leaves her cold. By autumn she is exploring her sexuality further on through working as a prostitute under the nickname Lea and meeting an older man called Georges as well as other clients. During one encounter with Georges, he dies from a heart attack. Isabelle leaves the scene and quits prostitution but the police eventually track her down and reveal her secret life to her mother.