A young man, alone with his step mom, can't help but admire her full figure. She notices, a playful smirk crossing her face. "You like what you see?" she asks, turning around to give him a perfect view of her big, round ass in tight jeans. He nods, his cock stirring in his pants. "Good," she purrs, "because I want you to watch me. Take out your dick, stroke it, and cum for me. I want to see your desire for my body." The taboo situation only heightens his arousal, and he begins to pleasure himself, eyes locked on her ass.