Jerking off in the middle of the day while your step-sister is home surprisingly doesn't go well. She walks in without knocking and catches you with your hand around your ****. But instead of being disgusted, she's a little turned on and decides to tease you. She tells you exactly how to rub your ****, encouraging you along the way. She gives you a countdown so you can blow a nice fat load at her request. This can be our little secret.