(masterpiece, best quality, photorealistic, highres), 1girl, 20 y.o., nude, taking mirror selfie in luxurious marble bathroom, hourglass body, wide hips, plump round buttocks, slim waist, perky medium breasts, soft pale skin, long wavy blonde hair, pink lips, delicate facial features, sitting on wooden counter, white towel hanging on wall, round white sink, modern design, fresh calla lilies in foreground, subtle ambient lighting, natural expression, direct eye contact with camera, relaxed confident pose, elegant minimalistic interior, glossy marble surfaces, realistic reflections