Your step-sister has called you into her bedroom to ask you a massive favor. She confesses she's damaged your mum's car and she really wants you to take the blame for it, but you would like something in return. Demi has amazing big natural tits and you've always wondered what it would be like to have a wank over them. Although Demi thinks you're a massive perv for suggesting it, she accepts your offer and allows you to stroke your cock!