I’m remember a drama possibly a foreign film. A business woman drops her keys at work and a male coworker picks them up. He goes to her house and lets himself in. In her house he goes thru her things. She comes home and he hides in her closet and watches her. He sees that this important business lady is bulimic and sad.
Maybe Vive L’Amour? https://www.youtube.com/watch?v=8ymap4YzM2E