Fat Girl is a 2001 drama film written and directed by Catherine Breillat, and starring Anaïs Reboux and Roxane Mesquida. It was released in certain English-speaking countries under the alternative titles For My Sister and Story of a Whale. The film's plot follows two young sisters as they deal with coming-of-age, sibling rivalry, and desire while on vacation with their family.

Plot

Anaïs and her older sister, Elena, are vacationing with their parents on the French seaside. Bored of staying in their vacation home, the two walk into town while discussing relationships and their virginities. Although the conventionally attractive Elena has been promiscuous, she is saving actual intercourse for someone who loves her, while overweight Anaïs thinks it is better to lose one's virginity to a "nobody" just to get it over with.