Twin Brothers (1974)

This one opens with a curvy, big-titted brunette MILF jerking off on a couch. She’s got fair skin, long straight hair, and a body that’s thick in all the right places. Things heat up when a muscular dude starts eating her out while another chick watches. The oral is intense, and the camera gets up close so you see every detail. Later, he fucks her missionary style on a bed, and the action is raw. The lighting is natural, and the angles are solid, especially during the oral and solo parts. The whole scene feels intimate and real.