(masterpiece, best quality, highres, photorealistic), an 18-year-old Ariel, bent over and having sex in a doggy-style position with a massive muscular man possessing an enormous, thick, veiny cock, (gigantic penis:1.1), her tight, wet vagina, (vaginal penetration:1.5), visibly stretched with each deep and intense thrust, her youthful and delicate facial features flushed with arousal, (wide expressive green eyes:1.3), soft flushed cheeks, (plump pink lips slightly parted:1.2), her long, vibrant red hair cascading down her back with a silky texture, (large, round, firm breasts:1.3), emphasized by the tight, shimmering teal corset of her mermaid-inspired gown, her glowing porcelain skin accentuated by soft oceanic lighting, her flowing teal skirt lifted high, exposing her round and firm buttocks, smooth thighs, and flawless shaved skin, her back deeply arched, her hands tightly gripping the edge of a seashell-shaped table with slender, well-defined fingers detailed with smooth knuckles and short, rounded nails, her legs slightly spread for balance, trembling under the intensity of his thrusts, the table creaking beneath their movements, his powerful hands gripping her hips firmly, his chiseled chest and arms glistening under the soft bioluminescent glow of the underwater palace, coral structures and shimmering aquatic plants surrounding them, vibrant sea creatures swimming in the background, ultra-detailed textures of fabric, skin, and surroundings, cinematic composition, HDR, vibrant but natural tones, smooth focus and moderate contrast for a realistic and elegant underwater scene., <lora:Microwaist_XL_v01:1.5>, <lora:add-detail-xl:2>