Three languages and a central address, booked most often by the partner with free days who is arranging the evening alone.

Portuguese, Spanish and English, and she will use whichever two a couple are most comfortable between. The message usually comes from one half of the pair, written in an afternoon while the other half is in a meeting, and she treats that as normal rather than as something to query. Twenty-four, and she asks only what she needs: the hour, the length, the address, and whether it is one therapist or two. A central flat keeps the journey short on the evenings when the hour slides late. Her own limits are stated when she arrives, and they cover both people in the room.

Naya 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.