Outcall, and why the travelling is hers
Outcall means she travels and you do not. The session happens in the room your short break is already booked into, at the address you give in the thread.
On a trip of two nights the room you are staying in is the only address in this city you know how to get into after dark, and outcall is the arrangement that keeps everything inside it. You write the address down once. She makes the journey. You stay where your luggage is, behind a door whose lock you have already used.
There is no second address
Twenty-three therapists work from this roster and the house holds no premises of any kind: no studio, no flat kept aside, nothing a visitor could be sent to on a Saturday evening. That absence is deliberate rather than an oversight. A cross-city journey in an unfamiliar place, with a return trip still to come and half a weekend already spent, is the part of a short break most likely to go sideways, and outcall removes it completely.
Two clocks, one for the city and one for the airport
Central Amsterdam runs on one figure: forty to sixty minutes from a confirmed booking until she is at your door, the same in every central district and the same on a Friday as on a Sunday. Schiphol and the hotels beside it fall outside that figure and are arranged separately, with the journey time agreed with you before anything is fixed. Nothing beyond Amsterdam and those airport hotels is reached at all.
What it asks of you
Three lines, typed while you are already writing. The address with a floor and a room or apartment number on it. A phone left charged and face up, because a weekend booking that goes wrong almost always goes wrong through a phone nobody picked up. And a word about the entrance if the street door locks itself after a certain hour or guests are met downstairs. The booking page sets those out in order, and no part of the fee moves because of where in the centre you happen to be staying.