A softly lit modern bedroom in the late afternoon, golden sunlight filtering through sheer white curtains, casting warm stripes across a large bed. On the bed, a muscular man with short brown hair kneels behind a thin young woman with long auburn hair, her body arched on all fours, his erect penis thrusting deep into her vagina from behind. Her small breasts sway beneath her, her face flushed, eyes half-closed, lips parted in quiet moans. Beside the bed, a woman with shoulder-length dark hair and a slim figure sits on a wooden chair, dressed in a silk robe loosely tied at the waist. Her legs are crossed, one hand resting on her knee, the other holding a half-empty glass of red wine. Her expression is calm, watchful, a faint, knowing smile on her lips. Her eyes trace the movement of her husband's body as he fucks the other woman, his hips slapping against her pale buttocks, his shaft slick with arousal. The wife's bare feet rest on the cool floor, her toes occasionally curling. A thin sheen of sweat glistens on the man's back and the other woman's lower back. The scene is intimate, voyeuristic, the wife's gaze steady and unblinking. Soft golden light, full explicit genital detail, photorealistic, 8K.