In the dimly lit bedroom, the brother lies awake, his eyes flickering between his two sleeping sisters. His mind races with forbidden thoughts, his heart pounding in his chest. Unable to resist the urge, he slowly pulls out his already hardening cock. He strokes it gently, trying to be silent, his eyes locked onto the soft curves of his sisters. The risk of being caught only heightens his pleasure, his breath hitching as he brings himself closer to climax.