I had no idea what my new step sister was into until I stumbled upon her secret stash of porn. I was shocked to find out that she had a thing for big cocks and threesomes. I couldn't believe it, but I was also turned on by the thought of being with her. I decided to confront her about it and she didn't deny it. Instead, she invited me to join her in satisfying her desires. I was hesitant at first, but I couldn't resist the temptation. We started off with some hot foreplay and before I knew it, we were both naked and ready for action. She took my cock in her mouth and sucked it like a pro. Then, she let me fuck her tight pussy and I could tell she was enjoying every moment of it. We continued to fuck each other for hours, trying out different positions and toys. It was the best sex I had ever had and I knew that this was just the beginning of our sexual adventures.