It was late in the night when I heard the noise. My name is Todd and these sounds woke me up. Looking over at the clock told me it was 1:15 AM. I got up and put my bathrobe on. I walked out into the hall and I heard it again. A sound as if someone was moaning. My son, Tommy, and his girlfriend, Andrea, had been out earlier that night. My wife and I had an agreement with Tommy. His girlfriend could stay over but only if Andrea slept in the spare bedroom. It sounded like some passionate lovemaking was taking place. My wife would be furious if she found out. I walked to the spare bedroom door and listened in.
I was about to knock on the door, when I listened more closely. I only heard a woman's voice. The door wasn't closed fully. I pushed it open slightly and looked in. There was Andrea naked on the bed. She was using her fingers and rubbing her clit, then she was inserting them into her pussy. Andrea was just eighteen and a looker. She had dark hair falling to her shoulders and wore glasses. She had the studious look, I always said. From what I could see, she also had big tits with enormous nipples. My cock was beginning to stir.
I stood there hypnotized. I should have just turned around and headed back to bed, but I didn't. I opened the door and slipped inside. Andrea nearly jumped off the bed. I held a finger to my mouth. telling her to be quiet. I closed the door and then locked it. Andrea watched me the whole time, not saying a word. I then let my bathrobe slip to the floor. Andrea let out a gasp. I am no model to be sure. I am slightly overweight and my hair is thinning out. However I do have a large cock. That cock was now dangling between my legs and Andrea was looking at it intently.