My nalgona stepsister and I are alone again, and I can't help but notice her plump ass swaying enticingly. I sneak up behind her and start jerking off, my cock throbbing with desire. Suddenly, she turns around, catching me mid-stroke. "Masturbando otra vez?" she taunts, her eyes locked onto my stiff cock. I brace myself for another round of her teasing torment, but this time, she surprises me by dropping to her knees, eager to taste my forbidden fruit.