Masterpiece best quality, 28yo adult female with a heart-shaped face and obsidian hair, wearing the glossy black PVC harness top and gold-studded leather pencil skirt. She is lying on her back on a white satin sheet, legs hoisted high and spread wide in a deep V. She is using a thick, oversized clear glass dildo, pressing it deep into her core. The image captures the moment of maximum stretch, showing the, (vaginal introitus stretched wide and gaping around the thick glass shaft:1.3), the vestibule tissue pulled tight and translucent, and the labia minora pushed flat against her olive skin. Her expression is one of overwhelming intensity, eyes rolled back, lips parted in a silent scream of pleasure. High-contrast studio lighting creates sharp reflections on the glass and the glossy PVC, 8k resolution, macro focus on the gaping interface.