Your step-sister, clad in sexy lingerie, is a vision of temptation. She's rubbing her smooth pussy, her big ass quivering with each touch. 'I want to feel your cum in my panties,' she moans, her eyes locked onto yours. You watch as she spreads her legs wider, her shaved pussy glistening with her juices. She's a horny sight, her clit rubbing against the fabric of her panties, begging for your cum. You oblige, cumming onto her pussy, her lingerie soaked with your desire.