After a Video chat call ends, your sister realizes you've left your webcam on. She tries to get your attention several times before realizing you're playing with your cock. Completely stunned, she watches as you play with yourself, getting wetter and wetter as you stroke faster and faster. Before she knows what happened, you've cum, and she's left with this intense desire to see your cock again. A few weeks later, your sister has a plan in mind to see you jerk off again. This time, she wants to put on a show for you. After a seemingly normal Video chat call with your sister, you leave your computer for a while. When you come back, however, you sister is still on the call-- and she's starting to take her top off...