My wife was at work and I was at home with the k**s. My step daughter who was 15 at the time asked me if she and her friend Stacy could hang out aroun... the pool if they minded her little brother. I thought hell yeah! I can hide in the man cave, drink a few beers and catch up on some porn. It was the first day of a week long vacation, and couldn't think of a better way to start it off. After a few beers under my belt, i needed to piss. I went to the restroom upstairs because it overlooked the. His cock was an inch inside her and rising. She could see the delight in his eyes. Hers in turn widened as his adequate tool filled her. His hand hooked under the small of her back making her thrust her chin and tits up. Debbie instinctively gave a long gasp." Aaaahhhhhhh!"He jerked his hips thrusting deep. "Aaaahh, ahhh, ahh" Debs gritted her teeth, "oh shit he was hard." His cock pressed inside her, onto her anal muscles. She widened her eyes even more. "Oooh, ooohh!" She felt her ass give a. I felt like I was fucking like a real man now, I started going in and out of her hard and fast, pressing into her on the downstroke with all my weight, trying hard get as much of my body inside her as I could. I was making the small building shake. She began squealing louder and I thought I was hurting her, so I rolled over while holding her tightly keeping her impaled upon my dick. Once on top, Barbara paused to savor the new sensations, then began working her ass around slowly, keeping me. I know where we can put this," she teased, and then still holding it, began leading me back towards the beach. It was just dark enough that no one could have actually seen me, but it was clearly evident what Penny was holding onto as we made our way back, laughter following us along with a few well placed jabs at who had who by the balls. Grabbing one of the large blankets we'd brought down to the beach just for this very purpose, Penny and I walked off a little ways, well away from the others.