hentai anime style, extreme low-angle close-up, dirty worn wooden mop handle penetrating a woman's vagina, her body arched on cold tiled prison floor, legs spread wide, hands gripping floor tiles in pain, background shows prison boots and laughing tattooed female inmates in grey uniforms, cold fluorescent prison lighting casting harsh shadows, drops of blood on the mop handle, rusty sink and barred window in background, detailed realistic hentai shading, gritty underground atmosphere, humiliating expression on her face, tears and sweat, rough textures, high contrast, 8k, masterpiece, dark erotic, vaginal, object, insertion,