Mackenzie Mace sits on her bed, brushing her long, lustrous hair, when her stepbrother Peter Green enters. He watches, entranced by her gentle strokes and the sway of her ample bosom. Gracie Gates, Peter's girlfriend, joins them, her eyes widening at the sight of Mackenzie's curves. Peter can't resist, stepping closer to Mackenzie, his hand replacing hers on the hairbrush, gliding it through her silky tresses. Gracie, jealous yet intrigued, watches as Peter's touch ignites a spark in Mackenzie. She tentatively touches her own breasts, her nipples hardening beneath her shirt. Peter, sensing her arousal, leans in, his lips brushing against hers, while Gracie looks on, her own desire stirring.