Beautiful girl with large breasts lying on her back with legs slightly apart, man on top, engaged in missionary sex in an indoor pool, masterpiece, best quality, high resolution, ultra-detailed, HDR, deep focus, sharp, vibrant colors, perfect composition, cinematic lighting, high contrast, photo-realistic, 8k wallpaper, full-body shot, detailed water reflections, clear water surface, crowded environment, people swimming and standing around, indoor lighting with soft shadows. Age 21, curvy figure, balanced proportions, lying on her back in missionary position, smooth skin, wet skin from the water, soft lighting emphasizing body contours, no visible tattoos. Detailed face, long wet hair, slightly messy from the water, medium-sized lips, bright eyes, soft facial features, neutral expression with a hint of pleasure, water droplets on the skin. Both completely nude, fully exposed, no accessories or jewelry, barefoot. Indoor pool, large with many people, water splashing around, people swimming, chatting, lounging by the poolside, pool lights reflecting on the water, tiled floor around the pool, glass windows reflecting the indoor lighting, calm atmosphere, subtle echoes from people talking. Emotions are relaxed, slightly aroused, focused on the sexual act, peaceful expression.