Taking a deep breath, I adjusted myself in my step-sister's tight little ass. She was lying on her stomach, her skin glistening with sweat as I thrust into her from behind. I couldn't believe we were doing this - following the instructions on that dirty video together.
The buildup had been intense. We started with some light foreplay, touching each other's bodies in ways we never had before. Then, she climbed on top of me, her soft, warm pussy rubbing against my hard cock. It was driving me crazy, but we continued following the video's directions.
Finally, we reached the last step - anal sex. At first, I was hesitant. I'd never done anything like that before. But my step-sister convinced me it would be hot, and she was right. The initial penetration was tight and The initial penetration was tight and required some force, but as they moved in sync and became more attuned to each other's rhythms, the friction gave way to a sensuous dance of flesh on flesh.
