She sat the syringe down on the metal tray and pushed it away against the wall. Through my pain haze, I saw her opening another drawer and felt any st...ength left in me drain away. I stopped struggling and just fell back into the intense burning pain coursing through my body. She took a simple pair of clover clamps out of the drawer and attached them to the very tips of my nipples. I screamed again, shocked that she could bring me more pain than I was already in. She tied a long piece of twine. I want it. You have to give it to me,” Lisa growled through labored breaths. She couldn’t take much more torture from Mark. She needed it and had to have it. She was going to get it somehow.--------Lisa and Mark had been together for months now. They had a good thing together. They enjoyed everything about each other. Lisa adored Mark’s confident nature. Mark idealized Lisa’s thirst for sex. Together they made a dominant team in the bedroom. They had mind-blowing sex for hours. Each one knowing. "That's when I saw it. A naked butt walked into view from the left. I knew that butt. It was David. His cock was pink and erect -- the head shiny with precum."Come here, baby. I'll take care of you. Give it to me." David walked right up to her, put his left knee up on the couch and his cock right at Sandy's face. She smiled up at him, leaned over and took his cock in her mouth. David's groan leapt from the speakers.I was so shocked, I just kept doing what I was doing, pumping the vibrator in. Fiona did just that as she always did until I was about to come, then Fiona would lay on the bed and lay her underwear for the day across her pussy. Wanking furiously Id finish myself off coating her knickers, bra and parts of her stomach and thighs. Fiona would then dress in the sodden sticky underwear and head to work. Just as she was about to leave I shouted, Dont forget to switch the cam on, and youre expecting a parcel today. What parcel? Youll see. I sat watching Fiona on and off.