Sin Dreamer (1977)

Dark-haired girl in a tight-fitting top starts things off with a face full of cock — she’s deep-throating like a pro, jaw stretched wide, guy slamming into her mouth while she braces against the bed. They move from the office-looking room to a dim bedroom, where she switches to riding him slow, then gets flipped into doggy for some hard, slapping action. Redheaded girl in fishnets shows up halfway through, joining in with a strapon or maybe just grinding — hard to tell, but they’re both sweating, tangled in the sheets, swapping positions. The lighting stays low throughout, mostly close-ups during oral and medium shots when they’re fucking, giving a raw, almost voyeuristic feel. You get solid dick-in-mouth time, lots of thigh and ass movement, plus good views of the redhead’s curvy frame in those green-patterned pillows. Nothing fancy, just steady fucking and two women who don’t mind getting messy.