I came home from the gym and found my slutty sister on the phone with her boyfriend telling him she had a surprise for him. I stopped and listened and watched. What is this slut up to now and what does she have in her hand? She got off the phone and bent over showing her huge ass to me, this is starting to get good. She grabbed the object and I recognized it. She had a butt plug. Damn, that's hot. I watched her as she played with her ass and stuck the plug in. Shit, she saw me. I'm going to tell mom and dad you are sending sexy pictures to your boyfriend. What can she do to stop me? This is getting interesting. I will tell you what sis, you take care of my hard on and I wont tell our parents that you are sticking weird objects in your ass and sending pictures of it to your boyfriend. I cant believe she agreed. She grabbed my cock and started sucking. I told her she was going to have to do better so she told me to lay down and she rode my cock sideways. That but plug was so sexy. Just when I was about to cum her boyfriend called. The thought of her talking to her boyfriend while I'm fucking her turned me on that I couldn't help but cum all in her face. If only her boyfriend really knew what was going on on the other end of the phone. You know what, I'm still gonna tell mom and dad though!!