XiaoYing's body aches with unquenched desire, her fingers pressing against her clit, the wet sound of her masturbation filling the room. She longs for more, her mind filled with images of her brother's strong hands, his mouth on her breasts, his cock filling her. She reaches for the nearby bottle of milk, pouring it over her body, the cold liquid contrasting with her heated skin. She moans, her body writhing, when suddenly, she hears footsteps. She freezes, her heart pounding, as her brother enters, his eyes widening at the sight of her. He hesitates, then steps closer, his eyes locked on her glistening, milk-soaked body.