She was hot and the shaft of my cock was getting wet and slippery from the fluids flowing from her, my balls were ballooning with the tension building in them. Madison rolled to her back pulling me with her in one swift motion. I went to my knees between her legs and looked down on her in the feeble light from the camp ground lamp post. She grabbed my arms and pulled me over mature her then worked a hand between us and grabbed my erection. My sister pulled back the foreskin, stroked me a few times then moved my engorged cock around until the head of it slipped into the opening of her body. I responded to the feel of couple her by pushing into her as far as I could. Madison put her hands on my Fucking ass, looked up at me and breathed soundlessly “Stay there, don’t move.” I was vibrating with sexual anxiety, my body was tight with tension, I had to move. I tried to stay still for her but instinct overcame my will and I began to stroke in and out of the hot soft hole that enveloped my aching prick. She put her hands on my cheeks, locked her eyes on mine and followed my movement with her own. We were fucking. It didn’t register at all that I had just lost my virginity, it didn’t matter she was my older sister, it didn’t matter our parents were just a few feet away, the only thing in the world that mattered just then is what we were doing. It was all new to me. I’d been fantasizing about several girls and knew what I wanted to do with them but now that I was having sex with my sister they vanished from my thoughts in an instant. My entire concentration, my entire life blowjob force was focused on my sister. We mashed our bodies together urgently but softly, not wanting to shake the RV. Madison cautioned me to “Be careful, go slow.” We had both felt the results of mom and dad having sex in the back and she didn’t want them to wake up to the same motion. She didn’t have to worry. About the time she warned me to move slower, my balls erupted violently and I filled her with surge after surge of superheated cum. I had never before felt anything like the violent pleasure of ejaculating into Madison that night. We lay side by side panting, cooling off. Madison used paper towels to clean up the mess then we got dressed again. When we were done she stood against me, tits mashed against my chest and kissed me softly on the corner of my mouth then purred into my ear, “You Hardcore better sleep in the seat. I don’t know if I could keep my hands off you if you come back to the bed with me.” The next morning when I awoke Mom was cooking breakfast; the bunk was a table and Madison was gone. I stretched, yawned then went to find her. Just as I got to the ground she came around the back corner of the RV, she saw me and flashed large welcoming smile, her face radiant in the morning light. She gestured to me and stepped back behind the motor-home. I went around to find her and was momentarily stunned when she palmed my cheeks then kissed me solidly on the mouth. She pulled her head back, looked at me with large blue eyes and a big smile then said “Don’t worry, I liked it.” I was relieved that she would talk to me, not avoid me or fret about what we did. We weren’t going anywhere for a few days so Madison and I took off to the lake after breakfast. As we walked we talked. I picked up a burlap feed sack and wiped her mature ass clean of the cum now running down the crack of her ass cheeks. God just the thought of her made me ready! Adrenaline coursed through my veins. For you! Dakota in a whisper barely audible, “David, please make passionate love to Jill. Jill was laying, naked, on the bed, reading a magazine. And Hardcore couple I promise I’ll break up with Mark first thing at school.” "Belinda, I'm going to cum again. Only I blowjob got a big surprise when his dick swelled and locked in my pussy. Then she left me in the ruin of her bed while my brain, with the frenzy of a five-year old’s birthday party, worked through all that had happened. She's our little girl, Jim. Too bad she was such a stuck-up, cock-tease, cheerleader. Stacie's girl-cock buried to the hilt in me. I drank more water and ate a few more snacks to keep my energy going. When Vicky came in, Marline, who was sitting in the stuffed chair, Fucking pulled her knees up and said, "Jake, please tell Vicky that my pussy needs some attention." Yeah I was a bit of a perv. But there was a tingling feeling when his rough tongue found her clit. Juliana then started crying. As I adjusted the position of the last tree, Alice screamed, "Snakes! He looked down at his hand