Hyper-realistic, 8k UHD, masterpiece, highly detailed, sharp focus, cinematic lighting, explicit sexual intercourse, on a bed, silhouette of a slender blonde woman kneeling straddling a man’s waist and a muscular dark-skinned man with curly hair sitting propped up with pillows on the bed, facing each other, cowgirl position, deep contrast, stark silhouette definition, penetration, cock entering vagina, small conical breasts hanging down, visible breast contours, sweating, glistening bodies, she wraps her arms around his neck, curves and muscle definition, backlight through a large window, warm atmospheric light, rim lighting, glistening skin, erotic mood, intimate composition, focus on genitals and point of contact, moody shadows, high contrast, photorealistic skin textures, detailed anatomy