I remember a movie from the late 80s to early 90s where a guy and a girl meet in a bar. The guy seduces the girl and takes her to a warehouse/studio apartment. The have sex. He drugs her then proceeds to take care of her. I remember at one point where he give her sponge baths and tells her he will take care of her. She get better and finds out she is trapped inside the warehouse. He finally let her go and at the end of the movie she finds him and finds out he is married. She drugs him.