You’re on summer break from college and you take a vacation to visit your older step-sister in the city. She’s excited to show you around and have a good time now that you’re old enough to go out. Since you’re tired from traveling you go to bed early the first night. While you’re snoozing she sneaks into your room. You’ve grown up a lot since she’s last seen you and she is very curious about just how much you’ve grown. She pulls down the covers to take a peek at your dick. You must have been having a nice dream because your cock is rock hard. She can’t help herself when she sees your boner, and she begins to touch and lick your dick. You wake up, confused but aroused, and she explains that her boyfriend’s size doesn’t compare. You express concern because you know you’re going to have to see him everyday, and she assures you it’s ok. She calls her boyfriend into the bedroom, and shows him how big you are. She tells her boyfriend that she knows he always wanted to see her with a bigger dick, so this is the perfect opportunity. She continues to suck you while her boyfriend watches. You get more turned on that she’s humiliating him while devouring your cock. Before long she says that she needs to feel your big dick inside of her. She straddles you and your dick slides right into her wet pussy. She rides you for a bit but then wants you to take control and show her boyfriend how a real man fucks. You get her on her back to fuck her missionary, and then get her on all fours for doggie. Her pussy feels so good, and once she cums she gives you a countdown while she shakes her ass so you can cum all over it. After, she says that the three of you are going to have a great time together.