You're changing your clothes and all of a sudden your girlfriend's step-sister walks in on you. You'd expect her to gasp, turn around and leave, but she doesn't, she shuts the door behind her instead and sits down on the bed in front of you. You both know that your girlfriend is going to be back very soon, so you take advantage of the short time you get to play around with one another. After this video, you'll know you chose to be with the wrong step-sister.