Amoureuse plot
Marie (Charlotte Gainsbourg) and Antoine (Thomas Langmann) live together and are in love. She wants a child but Antoine does not agree. Then she meets Paul (Yvan Attal) who tries to seduce her, but Marie rejects him. But when Paul seduces her sister Juliette, she realizes that she is in love with Paul after all. She tries to forget him and talks it out with Antoine, but he thinks they've had sex and is sickly jealous. Marie gets lost, she thinks of Paul when she is with Antoine, and with Antoine she thinks of Paul. Then she gets pregnant, but she can't remember who the father is.