O Clube das Infiéis (1974)

Dude in his 30s with a mustache meets up with three wives in a park—blonde, brunette, and a redhead in a black swimsuit. They start off casual, sitting around a chessboard, but it doesn’t take long before the blonde’s on her knees giving him a sloppy blowjob while the brunette watches. The camera’s right there, close-up on her lips sliding up and down, saliva dripping. Then they switch to doggy on the grass, the brunette bent over while the guy pounds her from behind. The redhead’s not just standing around—she’s riding him reverse cowgirl, tits bouncing, while the blonde makes out with her. Outdoor setting’s risky but adds to the heat, and the lighting’s solid, so you see everything. No awkward cuts, just raw, unscripted-looking action with three girls who actually seem into it.