It's situational for us. If I could have had my way every time, my wife would lower her vagina over my face immediately after her lover came in her, softened, and his cock fell out. After we'd been married about 3 years and she had a lover on a regular (once or twice a month) her preference changed. Since then was always: missionary immediately after he finishes in her and rolls off. After she cums I leave the room and they enjoy their afterglow.