Your girlfriend is sitting on the couch alone when all of a sudden she becomes possessed! She thrashes, unsure what is happening to her. This goes on for a couple minutes, when she realizes that your sister has possessed her to finally get what she wants: You. You catch her as she is touching herself, and she comes onto you, admitting to her scheme. She lays you down on the couch where she proceeds to ride you, letting you cum inside of her, using your girlfriend's body even though it is your sister's mind that is enjoying it. When finished, she pulls her jeans up, telling you to get used to her being around from now on. The video ends with the sister's possession completing, and the girlfriend thrashing around again as her body becomes un-possessed.