Step sister Brook is determined to get her own back on her step brother after he walked in on her in the shower. She watches through the crack in the door, before bursting in to surprise him. But step brother Richie isn't embarrassed at all, he thinks it's funny - especially as he was just thinking about his step sister while he stroked his cock in the shower. Brook doesn't believe him, until she notices how big and hard his cock is - and suddenly she can't stop staring at it. And it's not long before she decides to join her step brother in the shower...