I stumble upon my stepsister in my room and we engage in sexual activity, resulting in me ejaculating on her buttocks

I was just hanging out in my room, trying to chill out and unwind after a long day, when I stumbled upon my stepsister. I couldn't believe my eyes! She was a sight to behold, with her big, luscious ass and her tantalizing curves that were just begging to be explored. I couldn't resist the urge to touch her, to feel her soft skin against mine. And then, things started to heat up. We were both completely naked, our bodies entwined in a passionate embrace. I took her from behind, my hands exploring every inch of her body as I thrust deeper and deeper into her. It was an incredible experience, one that left me completely spent and satisfied. And when I finally finished, I ejaculated all over her beautiful, round ass. It was a sight to behold, a testament to our undeniable chemistry and our unforgettable encounter.