When I visit my adult stepsister to return a borrowed manga, I find her wearing a VR headset and masturbating. She is so absorbed that she does not notice me standing in front of her. Even when I secretly fondle her breasts and pussy, she assumes the sensations are synchronized with the virtual experience. Taking advantage of her confusion, I slide my hard cock inside her without her realizing it and lose control, creampieing her. Then the force of my thrusting knocks her headset out of place.