"I'm warning you, don't cum on my breasts," my stepmom says, her voice laced with desire. I'm on my back, my big black dick standing at attention. She takes it in her hand, giving it a firm squeeze before leaning down to suck me off. She's a master at it, her mouth and hand working in harmony. I can feel my orgasm approaching, but I hold back, remembering her warning. She pulls back, her lips glistening with saliva and precum. "Good boy," she purrs, "now fuck me like you mean it, later tonight."