I backed out the door, moved out in the hallway and quietly pulled the door shut. I went back to my bedroom and lay on the bed trying to go back to sl...ep. But I just couldn't get the image of my dad's cock ejaculating out of my mind.Gingerly, I wiggled my index and middle fingers into my vagina. I inhaled sharply, feeling a nice tingling sensation. My two fingers slid in deeper, lubricated with the slimy wetness I could feel all around in my vagina. I closed my eyes, shuddering. I started to. . yeah," I managed. I went toward her and she turned around to address the ball again.I did exactly the same thing I do with everybody else. First I walked around her in a circle, telling her to bend her knees further, or straighten an elbow, or move one foot forward or backward. Then I got behind her, put my arms around her and gripped her hands.Of course, this put my iron hard prick right in the crack of her ass. I was trying to talk to her about her grip, and moving her fingers with my own,. Anyhow when they are wearing shorts they are no nude at all and after saying this, she faced and asked for my opinion.I told them that the best workout is with minimum clothes, and suggested them to visit YouTube and get the idea of it. To add, I told them that these professional do workout even in bikinis and others in full sleeves and full length gym suits. I told them to do whatever suits them best, but be mentally and physically comfortable. They all whispered something amongst themselves. I ploughed away at Julie for a few minutes with the same steady rhythm before I gripped her hips tighter and began ramming her harder making a loud slapping noise every time my hips hit her fleshy buttocks. I was fucking her so hard I could hear the wooden table legs scr****g across the tiled floor. Julie was letting out a loud shriek overtime I rammed my cock into her. Just as I was thinking I may be getting too rough she begged me to do it harder.I released my hands off her hips and pulled.