office wife
n.— «To my mind, a private secretary is an “office wife” for some eight hours of a man’s day. She should give him subtle encouragement, approval, admiration, respect. She should laugh at his jokes, overlook his faults and moods, and assure him of her loyalty in unspoken ways.» —“10 dirty secrets of a Bay Street temp” by Susan Bourette Globe and Mail (Toronton, Can.) Aug. 26, 2005. (source: Double-Tongued Dictionary)