Key-mistress

I am Don Mariano’s hands and feet, ama de llaves, key-mistress and custodian of Don Mariano’s house, caretaker also of his pearl, the choice child of his heart, Dolorcita, the star of my life.

Source: wiktionary

Every Moscow and Leningrad hotel that houses foreign visitors has long been the parade ground for state-controlled prostitutes, plying their trade only for foreign currency, reporting to the KGB and sanctioned by the gimlet-eyed key-mistresses on each floor who are on constant watch against amateur competition.

Source: wiktionary

Selia’s mother is the key-mistress of the palace, a woman with access. She might have found a way to steal my mother’s crest ring to make the seals.

Source: wiktionary