La bella Antonia, prima monica e poi dimonia (1972)

Antonia’s the star here, long dark hair, slim but with a nice ass that gets put to work. She starts off with a brunette MILF—both of them topless, grinding on each other near a waterfall. The guy with the beard joins in, grabbing Antonia from behind, kissing her neck while his hands roam. They move to the woods, and he fucks her doggy style right there on the dirt, her tits bouncing with every thrust. The camera gets close enough to see her face when she cums—eyes rolled back, mouth open. Later, they take it inside, switching positions, but the outdoor part is the highlight. No fancy editing, just raw, sweaty fucking with good angles on the action.