A Praia do Pecado (1978)

This one starts hot and stays that way. A brunette and a black-haired MILF are making out on a boat deck with mountains in the background. It’s broad daylight, and they’re not holding back. The guy joins in, and it turns into a full-on fuck session right there on the deck. The camera gets some nice close-ups of the action, especially during the oral parts. There’s a mix of positions, but the outdoor setting really makes it stand out. The natural lighting adds a lot to the scene, and the performers seem into it.