Les petites vagues -- Film Description:
"On family reunion day, Amélie feels out of place and lonely as her favorite cousin brings a lover over for the first time. Noticing their young passionate love, she allows her own fantasies to run wild, although some sensations are a lot more powerful than she thought."
-- Travelling Distribution

Source:
"Les Petites Vagues" Travelling Distribution. https://travellingdistribution.com/film/les-petites-vagues-366. [official site] [English / French]