Ruby has to stay after school for detention again with Mr. Bishop, and when he leaves the room for a moment, Ruby pulls out her phone and watches porn while masturbating. Mr. Bishop catches her and uses corporal punishment to teach her a lesson. He puts an apple in her mouth and gags her with it, and then fucks Ruby from behind while she's bent over her desk. Then he fingers her until she's dripping with cum. Ruby loves detention now!