I nodded and laughed that it was his turn, expecting him to quit rather than strip completely. He surprised me by taking off his jock strap and nodding back at me. Oh shit, I thought. I should quit, but that wouldn't be fair and I'm competitive by nature so I took off my thong. I have a nice furry pussy and some pretty cunt lips which he could clearly see as he walked a bit closer. I laughed at him and he laughed back.
He said, "This isn't fair, you are still dressed." I gave him a sassy smile and pulled my sports-bra over my head. I stood before him nude. He clearly was enjoying what he was seeing as evidenced by his hardening cock. It was a nice specimen and he looked particularly sexy with his toned, muscled body and his nice smooth prick.
Without saying a word, he moved toward me and put his arms around me and kissed me. I kissed back. I was in the moment and wasn't thinking of my husband or anything else as we embraced. We lowered ourselves to the ground and I reclined with his chest pressed into mine. We didn't say anything, but looked into each other's eyes with pure passion. He mounted me and slid his cock between my legs. My pussy was wet, so he slid right into my vagina. He gently, but firmly pumped his cock in and out of me. I wrapped my legs around him to hold him in me. We kissed and attacked each other eagerly as we fucked. His cock felt so good inside me. It was a bit bigger that I was used to. It was really affecting me and I had and orgasm. My body tensed as I came. I was squeezing his cock as it was moving inside me and I pulled the cum from him. He shot a load inside me. I could feel the warm fluid gushing into me.
He kissed me and then he stood up. He said, "I'm Dennis." I said, "I'm Penny." Without another word, we both got dressed and he took off on his return run. It took me a few minutes to catch my breath and then I started to run too.
I'm not sure what happened to Dennis. I never saw him again. It must've been his last day there and he did what he had fantasized about while he was watching my ass as I ran ahead of him. I always have a good memory when I stop for my stretching exercises during my run. It jogs my memory.