Our lonely protagonist explores his new sex toy, a realistic masturbator, with eager strokes. Lost in his fantasy, he's oblivious to his sister's entrance. "What are you doing?" she gasps, her eyes widening at the sight of his throbbing cock. "Want me to fuck you instead?" he taunts, holding up the toy. She hesitates, her gaze locked on his erection, then turns away, leaving him to finish alone, the room filled with the sound of his eager stroking and her lingering gaze.