She is fisting her own pussy. Self fisting, pussy fisting, vaginal fisting, vagina fisting. A hyper-realistic, cinematic digital painting of a muscular, athletic female mechanic bent over working inside a futuristic vehicle's open engine bay. The viewpoint is directly from behind, showcasing her strong, defined back muscles and curvy, powerful lower body as she leans deep into the machinery with both arms extended forward. Her vivid auburn hair is tied up in a messy bun with a slim dark headband around her forehead. She wears a dark green, weathered leather jacket cut off just above the bottom of the bust, the jacket is undone exposing her vuloptuous breasts. She also wears a very short, leather dark green mini skirt which has ridden up exposing herself. She is not wearing any underwear and we can see her anus and her wet gaping pussy. Her outfit is stained with grease and dirt from work. A large wrench rests near her right hand inside the engine bay, surrounded by cables and mechanical components. The scene is brightly lit inside a clean, white sci-fi hangar with smooth metallic surfaces, emphasizing contrast between the polished environment and the gritty work she's doing. She is fisting her own pussy. Self fisting, vagina fisting.