Sex Life of the Gods, The by Michael E. Knerr (1936 - 1999)

the silk blouse. The clear milk of her flesh, at the “V” of her throat excited him in a strange way. When he thought of her as his wife, it was frightening. It was as though someone had tossed him a woman and expected him to just fall into the routine of marriage. It wouldn’t be hard to come to love this woman, but it would take awhile. Hell, he didn’t know her. She was a complete stranger who had suddenly told him they were married. There was nothing familiar about her; even the fingers that were softly working over his face were alien. (Summary by Blurb from the Front Flap!)