Cindy rose and faced Robert. ?Put your hands behind your head? he ordered and when then were up he slapped the side of her pin filled tit.?one? he sai...d as she yelped?two? he said as the slapped the other tit?three?, ?four?, ?five?, ?six?, ?seven?, ?eight? each slap getting another yelp.?Now try again? he said. Cindy returned to her knees and slowly began to withdraw a pin, this time making sure she took more than 10 seconds to do it. When all of the pins were out of her tits, they were covered. My cock too glistened with Nickis vagina juice. Please&hellip, she said once more, shaking her head and sobbing. I walked up to her laughing and let the door of the cubicle hang wide open, just in case anyone wanted to see what I was about to do to this little good girl. I was going to fuck her little nerd brains out. I turned Nicki around and slammed her chest into the wall, eliciting a yelp from the thin girl as her boobs were squashed against the dirty wall. She cried more, her damp hair. I sneaked inside and walked over to her underwear drawer. What I was about to do was so wrong, yet I wanted it so badly. I pulled the drawer open and rifled through the drawer aiming to select the sexiest pair of underwear I could find.I moved a pile of underwear aside and to my horror, underneath I found several condoms. My mouth fell open. “Was my sister fucking John? How many other boys had she had sex with?” I wondered. I’d always assumed that my sister was a ‘good girl’ not going any. 'I shall leave you two nurses to keep him happy', she said, but my mother fired back immediately, 'We shall leave my daughter to discover her own needs', she said, and stood up leaving me with this huge cock in my hands.As the old lady left the room my mother turned and said, 'He cant produce any cum, so you're safe', and closed the door behind her.I sat there my mind everywhere, I was on a sexual high even though I was not aware I was. He lay there quietly as I stroked him using long strokes.