It's the weekend before Halloween and you and your step-sister are home alone, your stepparents left you in charge and told you not to let your step-sister leave the house. You're sitting in the living room when you see your step-sister walking towards the front door so you stop her and ask her where she's going. She gives you an attitude and tells you its not your business, but you remind her that you're in charge and then you notice she's wearing a super slutty school girl costume! You know that your parents would not approve of this so you tell her that you're going to tell step-mom and step-dad and you start taking pictures of her costume with your phone. She tries to get the phone from you, but you won't let her and you tell her she has to do something for you in order for you to delete the picture. She tells you she will do your chores and homework for a week if you just delete it, but you had something else in mind. You tell her if she gives you a blowjob you will delete the pics and step-mom and step-dad won't find out. She refuses obviously, but eventually she gives in. She sucks your dick for a few minutes being a brat the whole time, and then you tell her she can go. But as she gets up you bend her over and decide you want more. You stick your dick in her pussy the whole time with her calling you the worst step-brother ever and telling you that you better not cum inside her. You tell her you won't, but eventually you get too close and accidentally cum inside her, causing her to have to go to the party with your cum still in her pussy.
