Oh, Serafina! (1976)

Starts with a curvy redhead MILF in a dim bedroom—she’s got long hair, red lipstick, and a tattoo on her side. The guy’s slim, dark hair, looks like he’s in his 30s. They’re touching, getting handsy, and you can tell they’re into it. Later, they move to what looks like an office with a bookshelf—bright lighting, so you see everything. She’s sitting on the desk, legs spread, while he fingers her. The camera gets close when she jerks him off, slow and teasing. Another dude shows up at some point, but the focus stays on the redhead and the first guy. Good mix of soft touches and harder stuff—nothing too rough, just steady buildup.