MY LESSON FROM DAD I wasn't prepared for my chem test, so I told the nurse that I wasn't feeling well and she let me go home. Since both of my parents work and I like only half a mile from school I told the nurse that I would walk home. The fresh air would be good for me. I got to my house to see two cars in the driveway: my dad's and a car I didn't recognize. I thought that this was sort of weird considering my father normally came home at around six. I entered quietly, wanting to see what was going on. I didn't see anyone around but I heard something coming from my parents' bedroom so I walked up the stairs. Through the crack in the door I got an eyeful. There was a girl, couldn't have been more than nineteen riding my father's cock. I could see her full tits bouncing up and down and she moaned quietly. "Fuck me, Professor Donaldson. Yeah stick that cock in me." Her fingers reached down to her moist pussy and flicked her clit. Her other hand squeezed her nipple. I couldn't see my fathers face, but I knew it was him because his shoes were still on. And then I heard his voice. "Come on you little slut. Ride me baby. That'll get you an A." So much was running through my head. There was my father, cheating on my mother, with one of his fucking students. I couldn't even think. I don't know what happened. It all happened so quickly. I must have made a noise or something, or maybe she saw me, because all of the sudden, she screamed and fell off of my dad's throbbing cock which was waving in the air. "Shit," she said as she slid on her underwear, grabbed her chest and ran past me down the stairs, putting on her shirt and running out the door. My dad just laid there and reached over to the dresser and put on his glasses. All of the sudden it hit him. I have a huge hard on. How could I not have. For the first time I realized how hot my father was. He had short dark hair which was just beginning to gray. His chest glistened with sweat and his gorgeous red cock shot out from a patch of dark hair. His heavy balls rested on the sheets my mother had carefully coordinated with the rest of the room. "Hello, son," he said calmly. I couldn't even speak. I started to cry. How could I be attracted to own father? I ran from the doorway to my room. I tried to lock my door but he was there. His nakedness burning my eyes. "How could you?" I croaked out. "You listen to me," he said. "You are not going to tell a word of this to your mother. You understand." I had never heard him be so forceful before in my entire life. "I saw that boner of yours. What is she going to say when I tell her that you got off on watching, huh? What is she going to think then? Do you understand?" I nodded my head yes. "Well now that you interrupted my little session, you are going to have to make it up to me, aren't you? Here I am with this throbbing cock and now where to put it. What am I going to do? You ever been fucked up the ass, son?" A meek "no" squeaked out of my raspy throat. "Well then there is no better time than the present. Take your pants off. Quickly. Get on your hands and knees, boy." I obliged, pretending I had no choice, but my heart was pounded from anticipation as well as fear. "Now I would normally loosen an ass up, but we don't have much time, do we? No we don't." He pulled down my underwear and spread the cheeks of my ass apart with his strong hand. A sharp pain followed by a fierce burning followed. I bit my lip to keep from screaming. "That's it boy." I felt like I was being split in two. I thought I was going to die. But he didn't waste anytime and he started pushing deep in my virgin ass. He grabbed my hips and pulled me onto him and he started pumping me. I could feel his hot dick inside of me. Burning its way in and out. I could feel the ridges and the veins. He would fuck me fast a couple of times and then slow. "Mmm, so tight son. You are making your daddy proud," and he slapped my ass encouragingly. He started to speed up, his rhythm getting faster and faster. "I'm gonna cum in your ass, son. Just like I came in your mother the day your were conceived. Make me proud, boy. Oh, yeah." He came inside me. His hot sperm filled me as he pumped it in. He slammed against my ass so hard, filling me with his essence. He pulled out of me when he went soft, his cum leaking out of my sore ass. He rolled me over on my back and kissed me softly on the lips. "I love you," he said as he stood up and walked out of the room, leaving me there with an erection unlike anything I've ever had and thoughts of him fucking me forever.