Twenty-two, in the centre, and used to evenings that move twice before the working half of the couple is genuinely free.

Agendas slip. An evening that was going to start at eight starts at half past nine, and she would far rather hear that at six than at five to eight. Hungarian and English are both hers, and she talks as much as a room invites and no more. Her flat is central, so the journey is rarely the reason anything runs late. One change of date costs nothing if the request arrives more than a day ahead and the new evening falls inside a fortnight, which covers most trips that get extended at the last minute.

Clara 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.