After a few months of dating, my girlfriend and I decided to invite her dad over for a little get-together. As it turned out, he was quite interested in getting to know my girlfriend better, and as he put it, "getting to know her better" involved a lot more than just small talk. It seemed like he had some kind of plan in mind, but I had no idea what was coming. Then, he suddenly pulled out his phone and showed me a video of his step-daughter teasing him in the bathtub. My girlfriend was immediately turned on by it, and before I knew it, they were both stripping down and getting ready to seduce her. I couldn't believe what was happening. They started kissing and touching each other, and then they asked my girlfriend to join in. I was completely blown away by how sexy and adventurous she was. We all ended up having sex together, with my girlfriend riding my step-dad's cock while I watched. It was a wild and crazy experience that I won't forget anytime soon.
