Female kidnapper film

I’m trying to remember the name of this film. It’s modern, set in a city maybe Australian or US. Indie film maybe. A middle aged woman approaches a younger woman in a coffee shop. The younger is an interior designer and the older says she wants advice on decor. She drives her to the home to see the interior and implies she will give her some work. They chat but the older woman and the home are a bit odd and atmosphere gets tense. The younger one goes to leave but she persuades her to stay and watch a movie then play an old teen board game with a video showing boys to date. It escalates into a kidnapping and survival situation. At one point the younger woman is locked in an upstairs room and a cupboard. It transpires that the older woman’s boyfriend has been sleeping with the younger one and she is taking insane revenge.