The Defector (1966)

As a ruse, a man and a woman in her apartment, meeting on an illicit spy mission, have a surprise visit by secret police. They quickly remove enough clothing to imply they were intending to have sex later (shoes, jacket etc). He then reclines on her bed before the police take him away. Some time later, they recline on her bed and kiss. They are seen to kiss affectionately thereafter, implying intimate relationship.

No sex. Brief female partial upper nudity showing bare breasts reflected in a mirror as a man hallucinates.