My stepbrother's surprise encounter with me in the bathroom before class

In the early hours of the day, before the start of our classes, I found myself in the bathroom, brushing my teeth. Suddenly, my stepbrother walked in, completely taken aback by the sight of me, my big natural tits on full display. His eyes widened, and he couldn't resist the urge to touch them. I let him, as he began to explore my body, his hands roaming over my curves. His excitement was palpable, and I could feel the bulge in his pants against my back. I turned around to face him, and he unzipped his pants, revealing his impressive big cock. I took it in my mouth, savoring every inch of it. The sight of my stepbrother's big cock was too much for me to handle, and I found myself riding it, my big tits bouncing with each thrust. The sensation was overwhelming, and I could feel him deep inside me, his cock stretching my pussy to its limits. I rode him until I reached my climax, and he followed suit, filling me with his hot cum.