My step-sister and I decided to consume one night while our parents were out of town. After a few hours, Fifi ended up getting too much to consume and had to go to the bathroom. Only working bathroom, was our step-brothers...oops. Fifi ended up spewing in the bathroom, but felt completely find afterwards. We were leaving the bathroom, and our step-brother was in his bed, watching T.V. We were both horny, and no guys came home with us...so, we decided to talk our step-brother into having sex with us. We promised we wouldn't tell step-mom or step-dad our dirty secret