I was in my room, chilling, when all of a sudden I got kind of lonely. My step sister was in the room next door, so I decided to pay her a visit to see what she was up to. It turned out she was zonked out, but I was bored so I woke her up because that's just the kind of brother I am haha. She wasn't too mad, though. She was actually kind of flattered that I wanted to hang out with her. We talked about the good old days when we would hang out in bounce houses and stuff. Lately, she's been really busy with school and her boyfriend and I'm feeling a little neglected. She offered to let me hang out with her starting tomorrow, and that's when she noticed that I had an erection. It was embarrassing but she wasn't upset about it. In fact, she laid me down on her bed and started stroking my hard on. I was a bit hesitant at first, but she looked like she was having a good time so I did not stop her. She pulled my big black cock out of my tighty whities and remarked that it had grown so big since she last saw it. My dick was impressing her so much that she was getting horny. She put it in her mouth and started sucking on it. The noises she made with her mouth got me really excited. She then took off her dress and let her natural big tits swing around while she continued giving me head. She was so messy with it and got saliva all over my testicles. She then sat on top of me and rode me like a cowgirl. Her pussy was warm and surprisingly tight. I wish we did this when we were younger. I fucked her doggystyle and she gave me another blowjob. I then finished in missionary and came all over her pussy.