Teenage Bestsellers 238 (1980)

Big-titted brunette with dark hair and tattoos gets on her knees first, sucking a muscular black guy with a beard while the other girl watches. Then the slim blonde — early 20s, pale, small tits — takes over with a deep-throating close-up that shows every gag. They switch between indoor bathroom scenes and outdoors by the pool, where the black guy fucks the tattooed girl doggy style on a floating bed. The camera stays wide during the pool shots so you see the whole setup — water, sun, the bed drifting slightly as they pound. Later it’s the blonde riding him face to face, bouncing slow at first then faster, while the other girl jerks him off from the side. Everything’s well-lit in the outdoor scenes, dim but clear indoors, with medium shots that keep both faces and fucking visible.