The Chambermaid (2014)

Lynn is the most thorough chambermaid at the hotel where she works. Crippled by her own shyness, she rummages through the guests' belongings and even hides under their beds, vicariously experiencing their discreet interludes. When she finds herself present during a session with the call girl Chiara, Lynn can't help but let her curiosity get the better of her. Bold and unrestrained, Chiara soon draws Lynn out of her shell, opening her up to a new intimacy Lynn had previously only experienced as an intrepid voyeur.