Les patriotes (1994)

Blonde woman leaning against a rooftop railing, wearing a short dress, starts grinding on a guy sitting in a chair. She pulls his cock out and lowers herself down, riding him slow at first, then picking up pace. Another guy stands behind them, facing the city, shirt off, watching the skyline — not touching either of them. The lighting is natural, late afternoon sun casting long shadows, clear view of a dense urban skyline in the background. Camera stays wide, no close-ups of faces or penetration, but you see the full scene — her bouncing, his hands on her hips, the other guy just taking it in. No interaction between the two men. She adjusts her position a few times, leaning back for different angles, dress bunched around her waist the whole time.