You live in a college dorm with a roommate and your girlfriend. I am your sister, and I just heard that your roommate slept with and stole your girlfriend, and you are devastated. So, I drop everything to come see you and make you feel better. After I arrive, your roommate drops by to pick up some of his stuff and rub it in your face. I won’t stand for it, so I pretend that I’m your girlfriend. I notice that the thought of me being your girlfriend makes you hard and I get horny for you. I tell you how I’ve always wanted you since we were younger and often fantasized about sex with you. Even though you are horny too, you are reluctant. Don’t worry little step-brother, your step-sister is going to make it all better!
