Addie says that you were right about her boyfriend. She caught him texting with another girl and it was much more than a friendly chat. Addie is upset and you want to help her to feel better. You did warn her about this guy, though. Your step sister should have listened to your advice. Now she needs someone nice to talk you and it happens that this person is you. Addie likes you and she thinks you are hot, so she suggests that the two of you hook up. She says that it makes sense and you consider her offer. You think that fucking her might be a little extreme right now, but she asks to see your dick. You whip out your cock for her just to cheer her up. You are a good guy, after all. Plus, you love showing off your fat cock to anyone who wants to see it. With her titties exposed, she asks you to jerk off for her. Never one to turn down a jerk off request, you quickly fuck your step sister Addie.