Lust (2019)

Sara is staying the night at a friend's house. Her friend is away, but late at night Oskar, the teenage son, comes home. Sara and Oskar begin to talk, talking leads to flirting and flirting to kissing. Sara is not able to stop, not even when Oskar gets uneasy and wants out. He has to force himself away from Sara, and only when he disappears in his room does she understand what she's done.