Rose R "Dont Tell Mum"

Your step sister, Rose R, is being very naughty in her bedroom. You're spying on her as she pleasures herself while watching porn on her mobile phone. She doesn't notice you at first and reaches for her dildo, inserting it into her wet pussy, but then she catches you! She's desperate for you not to tell mum, so she offers you a deal. If you watch her masturbate with her dildo whilst you WANK your COCK, you won't tell mum. Do you accept your step sister's offer?...