Where There’s Smoke There’s Fire (1987)

The brunette has long brown hair and a curvy frame — you see her early on in a bathroom, slowly jerking off with a shampoo bottle between her legs, wearing just a towel. She moves to the bedroom later, fully nude, riding one of the guys hard with the camera tight on her tits bouncing. The second guy takes her from behind on the couch, deep doggy style with smacking sounds loud in the mix. There’s a wide outdoor shot showing both guys shirtless in a field, no action but you can tell they’re part of the same scene. Her skin stays flushed the whole time, especially when she’s on her back getting fucked fast, knees up near her chest. The lighting’s dim in the bedroom but clear enough to see every thrust and the sweat on their bodies.