You come home to find your step sis is waiting on you. She really wants to use the car for the weekend and was told you have it. She decides right there that she is going to tease and help you get off and not tell step-mom and step-dad. She knew your love of her pantyhose and socks so she has on purple seamless pantyhose in which she gets them dripping with pussy juice while you give in and stroke your cock.