(masterpiece, best quality, high resolution, photorealistic), stunning 40 year old milf bent over and deeply penetrated in the anus by a massive muscle horse in a public swimming pool, surrounded by a mesmerized crowd watching in awe and excitement, extremely large, round and firm breasts, erect nipples, radiant and flawless complexion, completely naked, bent forward on her hands, her back deeply arched, her legs spread for stability, (red hair pulled back in a bun:1.3), smooth cheeks flushed with excitement, (large and plump lips with red lipstick:1.3), slightly parted in pleasure, her hands detailed exactly with five perfectly formed fingers clutching used condoms, her anus completely exposed stretched deep and visibly, (anus very large, wide, big hole), her wet and shaved pussy glistening and clearly visible between her spread thighs, her toned legs shaking slightly under the intense penetration, her arched back highlighting her round and firm buttocks, stallion, a massive muscular horse with jet black skin, defined and dominant physique, broad shoulders, prominent chest, massive thighs, his torso slightly tilted forward as he thrusts deep inside her, his huge, thick, sinewy cock visibly stretching her lower abdomen with each deep thrust, (gigantic cock:1.1), (anal penetration:1.2), (anus wide, convex, gaping), clear blue water reflecting bright lighting, vibrant and dynamic composition, highly detailed anus textures, realistic anatomy without distortion, exceptional clarity and contrast.