I saw a movie on Netflix or Amazon. A teen/young adult is involved with a girl he goes for a run and then they have sex. Next scene the girl is doing laundry. Later in the movie the guy has sex the girls "sister" (I think) in college (again, I think) this scene is really darkly lit and I believe you only hear their voices. Later n the movie the guy stops by the girls house and is talking to her mother where it is implied that they to have sex. I cannot for the life of me remember what this movie is called, but I would like to see it again, please help if you can.