A sister, her heart pounding with desire, takes a call from her boyfriend, her voice laced with lust. She knows her brother is nearby, listening, and it turns her on. She describes their plans for later, her voice a low purr, "I'm going to ride you all night," she promises, her brother's breath hitching behind her. She turns, pushing him away, "Not now," she whispers, "Later, when it's just us." She hangs up, her eyes gleaming with anticipation.