full torso and limbs, nude woman lying on back, legs spread very wide apart in M shape, massive breasts with erect nipples, silver nipple chains connected downward, clit hood piercing with chain, three tight silver chains from both nipples and clitoris all converging into one metal ring embedded in lower abdomen, chains extremely taut pulling nipples and clitoris forcefully toward the belly ring, breasts and vulva stretched toward center, glowing淫纹 around the convergence ring on stomach, aroused trembling body, wet glistening skin, detailed chain tension and metal reflections, obscene pose, highly explicit, ultra detailed anatomy, 8k, nsfw masterpiece