Masterpiece best quality, tanned olive-skinned adult female on her knees bent forward on a dark stone floor, glossy slicked-back black hair splayed, body tensed and shuddering, a tight black leather collar squeezed hard around her neck, both wrists and both ankles secured to the ground with thick heavy metal chains pulled taut under strain, head lowered deep-throating a thick veiny shaft her mouth stretched wide around the buried cock tongue visible lips slick, eyes rolling back in her head wide and glassy in a raw beg, deep-V black gown densely encrusted with sparkling rhinestones torn and hiked up to the thighs, sheer black mesh netting stretched tight over bare splayed thighs and knees, a thick industrial chrome mechanical fuck toy with a heavy pulsing motor base buried deep inside her stretched open anal sphincter, the stretched rim flared wide around the gleaming metal shaft, glistening wetness and lubrication pooling at the stretched opening, detailed perineum under tension, 35yo primary biological muscular male standing over her one big veiny hand fisting her hair, sweat glistening on her tanned skin, mottled sage-grey textured plaster wall and gilded metallic leaf-branch sculpture behind, warm low studio key light catching the glittering crystals slick skin gleaming chrome and taut chain links, 8k resolution hyper-realistic professional photography sharp focus shallow depth of field.