Twenty-four, based near the conference hotels of the centre, close enough that an evening confirmed at seven can begin at eight.

Some agendas only settle on the day, and the couples who ask for her tend to be the ones whose evening was uncertain until the afternoon. A central address makes that workable: forty to sixty minutes from the hour being agreed to a knock at the door, most nights. English is the language she works in, which on a working trip is usually the one both of you have been using since breakfast. Dark-haired, twenty-four, and unbothered by a plan that changed twice before it held. She states her limits at the start in plain words and then leaves them alone.

Brooklyn decides which bookings she takes and may decline any of them; she sets the limits for what a session includes, says what they are, and may end a visit at any point, as the terms set out.