Friends sister

You are getting ready for a sleepover at your friends house your packing your bag, make sure you have your phone charger and then you leave. Upon arriving at your friends house you see his sister laying on the couch. You've always thought she looked good. You and your friend go upstairs to his room to play video games. You were playing for a couple of hours when your friends mom comes in and says you need to quit playing and go to sleep. You and your friend agree to his mom. As soon as the door closes you and your friend?