Pretty soon I had pulled her knickers down and was screwing her against the door.Then it happened. We heard the front door open and after a few moment... we heard Julies steps up the stairs. She tried opening the door, which was thankfully locked and asked who was in there. Julies mom answered that she was and then Julie asked if she had seen me. Julies mom explained that she hadn't and Julie mumbled something about my scooter was parked outside. Then we were both relieved when we heard Julie. You quickly turn the power off, and smile as you watch her continue to squirm, her body now covered in sweat, and trembling in fear. Removing her gag you say ‘We’re going to play a little game my slut, I’m going to turn on the machine, and I want you to tell me where you feel it, do you understand?’ ‘Yes Master.’ She says timidly. Over the next 15 minutes or so you torture her body with the electrodes. Varying the intensity and the length, and of course, the location. For the first time in. She just could not concentrate, her mind kept thinking about the crystal light shade on the ceiling that was shaking about faster and faster. She shook her head trying to get the thought of her parents out of her head. "74% of 368" she repeated over and over . She tapped the pencil harder and harder on her knee whilst biting her lip until, she jumped up off the sofa and walked towards the door. She stood at the bottom of the stairs listening to her mum moan with pleasure. Emma climbed the. Tina and I like to sex it up and I didn't want our late night intercourses to disturb her mom.When Tina's mom, Nancy, arrived, I found her to be an attractive middle age woman. She was a little taller than Tina and wore a short sun-dress that revealed a shapely pair of legs and a nice round set of tits. Her hair was long, very black and her face wrinkle free. Nancy upon seeing Tina gave her a long hug, then upon seeing me she gave a hug too. When hugging me , she pressed her body close to me.