He was running the palm of his hand over both of them, kind of like strumming a guitar. She had her face in his neck whispering to him as he made lov...e to her. She had shaved her cunt this morning to be more like it was that first time. He lightly traced her slit with his middle finger, then moved the tip to his nose and sniffed it. "Hey s*s, your pussy smells just like your panties. It's nice to know I don't have to get second-hand pussy smell anymore." Then he plunged his finger all the. However, that Friday, everything was going to change. As a matter of fact we had a lab instrument located in a small room, just large enough for this instrument, and it was located in the back of the lab, an area you would only access if you really needed to be there for that specific instrument.It was already 4 pm on Friday afternoon and most people had left the lab. Just Vanessa was left in the lab, one of my colleagues and myself. Vanessa had planned her first big experiment that day and. This time I left the curtin open, acting like I forgot to shut it, I left my back to them, and removed the outfit. Standing nude,I turned around to hang up the outfit. My tits and pussy was in full view, they just starred. I reached up and grabbed the next outfit and put it on. Pushed open the curtin , stepped out and checked myself out in the mirror. I went back to the dressing room, turned to the boys and asked what they thought of the outfit I had on. They were. His prick twitched violently in her hand. She moved her hips upward and the tip of his cock slipped between the lips and into her hot moist waiting hole. Her legs parted further and wrapped around his as she pushed up to meet him.The feelings that were running through him were mind-boggling. As he pushed into his sister she tightened her thighs as she wrapped her body tighter around his.The thrilling sensations on his shaft as it inched into her tight moist hole caused him to cry out and clench.