masterpiece, best quality, 8k, ultra-detailed, sharp focus, cinematic lighting, my little pony style, anthro pony, equine anatomy, 1girl, Fluttershy, pegasus, yellow fur, soft pink mane, teal eyes, adult mare, 1male, Big Mac, earth pony, red coat, orange mane, green eyes, adult stallion, both on a large bed with red silk sheets and scattered pillows, cowgirl position, rear view of Fluttershy from low angle, extreme close-up on her plump round ass bouncing, his thick equine cock penetrating her wet pussy, her hooves gripping his chest, looking back over shoulder at viewer with half-lidded eyes, deep blush, open mouth with drool, ahegao expression, background luxurious bedroom with candles, velvet curtains, and moonlight through window, warm golden and red rim lighting, shallow depth of field, glossy sweaty fur, hyper-detailed anatomy including spread pussy and tight anus visible, soft shadows, super sexy