Your step-sister catches you staring at her tits one too many times and decides to take action. She tells you to keep jerking off while she watches - in fact, shes going to go one better and film it, while encouraging you. Once you finish she explains exactly why shes filming you stroking your hard cock - now she can blackmail you, making you do whatever you want since you'll hardly want your folks knowing you were stroking it to your step-sis. She gloats about how she has one over you now and then saunters away.
Your step-sister catches you staring at her tits one too many times and decides to take action. She tells you to keep jerking off while she watches - in fact, shes going to go one better and film it, while encouraging you. Once you finish she explains exactly why shes filming you stroking your hard cock - now she can blackmail you, making you do whatever you want since you'll hardly want your folks knowing you were stroking it to your step-sis. She gloats about how she has one over you now and then saunters away.