In a sensual massage session, a busty sister spreads oil over her brother's muscular back, her hands slowly wandering lower, feeling the firmness of his glutes. She can't help but notice the growing bulge in his shorts, his cock stirring at her touch. She hesitates, then gives in, wrapping her oily fingers around his thick shaft, stroking it gently. His moans of pleasure encourage her, and she begins to massage his cock in earnest, feeling it pulse and grow harder in her hand.