I stumbled upon my stepsister pleasuring herself in the guest bathroom. The sight of her writhing in ecstasy was too much to resist. I couldn't help myself, I had to have her. I approached her, my heart pounding in my chest. She looked at me, her eyes wide with surprise and desire. I could see the anticipation in her eyes, the longing for me. I took out my big black cock and offered it to her. She didn't hesitate, taking me deep into her mouth. Her skilled throat work had me moaning in pleasure. Then, I turned my attention to her, ravishing her with the same fervor. We fucked hard and fast, our bodies moving in perfect rhythm. The climax was explosive, a testament to our forbidden love. I filled her with my seed, marking her as mine.