I came home early from work and found my stepmom on the sofa, shirtless and naked. I was shocked, but also aroused by the sight of her beautiful body. She saw me staring and invited me to join her. I hesitantly went over and we started making out passionately. Soon, she unzipped my pants and took my dick out, giving me a blowjob that made me moan with pleasure. After that, she bent over the sofa and let me pound her from behind. The sight of her big ass bouncing as I fucked her turned me on even more. We tried out different positions, each one more intense than the last. Finally, I couldn't hold back any longer and came all over her hot body. It was the best sex I've ever had, and I know I can't keep away from my stepmom anymore.