The brunette hair was pulled back into a no-nonsense ponytail, and then I was able to make out the elfin features of Mrs. Robinson, running to catch u... to me.Out of breath, she finally managed to scold me, "You're not picking up your phone!" I'm busy," I gestured to my girlfriend. "She needed to talk to me."Mrs. Robinson rolled her eyes, and Kaia look a little annoyed but kept her mouth shut, curious as to what my Biology professor needed from me."I need you back in the lab, as soon as. ? I wanted to tell her that I didn?t want anyof this and that this wasn?t my fault.?But instead I watched the video as the guy in it because to go in andout of the girls ass with his cock.? Ibegan to fuck my sister?s ass hard, like the video.? I never fucked a girl in the ass before andnever imagined my little sister would be my first time.? After about 5 minutes my sister began to fartwith even stroke in her ass.? I couldhear the guys in the room laughing and my sister began to sob.? She was. The winner gets to dare the losers to do anything he or she wants. If you don't do it, you lose." It took awhile, but everyone agreed. The next hand was played and Beth won. She stood up and as she pulled down her panties, told everyone else to get naked. So there we were, all four of us playing cards, naked. The next hand was delt, and Beth one again. She thought for a minute and then dared me to stand up and jack my cock in front of them. I wasn't going to be the loser and stood up. My dick. He said yes, if you don't mind, so i was able to manage get my jeans off and he was like wow, those look good on you, let me see your ass. So i manage to sit up on the seat and turned so he could see my ass. Next thing i felt his hand on my ass and said that's nice. I was like glad you like. He said sometime i have to hit that, i giggled. but right now dear, i want a blowjob. I said ok, lets see it, thinking he wouldn't but he pulled out a hard cock that was about 7-8 inches. He said i gotten.