Please, make them hurt. I want to feel them tingle for days." Grabbing her waist, I lifted he body just inches above my hips and with all my energy I ...tarted to thrust my hips up and down, pushing my dick into her as hard as I could. At the top of the stroke the head of my prick was just inside with her pussy lips wrapped around it. At the bottom of the stroke I could feel those same lips pushing down on around my balls. "Are you going to cum? Tell me when you're going to cum. I can feel your. "I stood there, in front of her cynical gaze, for what seemed like hours, until she finally sighed heavily."Fine. I have to come in and work on some of my research this weekend anyway." Reaching into her purse she pulled out a small slip of paper and a pen. "Here's the address for my office. I haven't yet received one of the "new" offices, so it might take you a few minutes to locate it. It's slightly sheltered from the rest of the university."Having said that she loaded up her lecture. I'm not sure if we dozed any or simply relaxed with our eyes closed, but she suddenly woke with a start. Her digital clock on the nightstand displayed 3:20. Chris would be getting home from school around 3:30. We didn't panic, but hurriedly dressed and had just sat down at the kitchen table with unopened bottles of water before us. Chris didn't seem to notice the flush on our skin and I hope he couldn't smell the hot salt tinge of sex in the air.He was surprised to see me here early but happy.. She started stroking me slowly, up and down, up and down as shesaid in a low voice, tinged with excitement and desire and lust,broken only by her heavy breathing, "The man moves inside thewoman, his penis going in and out, again and again and again,and he feels better and better and better..." Oh God, oh God" I cried as my first ever orgasm began to buildup."And he shoots his sperm inside the woman." Jenny concluded..The orgasm hit me so hard I had to reach out and grab Jenny. Ihugged her.