Session length, and the hour most guests underbook
Sessions run from one hour to a full eight hour night, and a quiet guest who cannot decide is usually better served by ninety minutes than by an hour.
The ladder is straightforward. One hour is EUR 180, ninety minutes EUR 270, two hours EUR 360 and three hours EUR 540, with each hour after the third at EUR 180. Two therapists in the room is EUR 360 an hour, two guests with one therapist the same, and two guests with a therapist each EUR 720 an hour. A full night is covered under overnight.
Why the hour is often the wrong choice here
An hour is a real booking and plenty of guests are right to take it. But a guest who has asked for a slow tempo and little conversation is buying unhurriedness, and an hour has a shape to it that works against that: by the time the room has properly settled, roughly twenty minutes in, a third of it has gone. Ninety minutes is where the tempo stops being something either of you is managing.
Reading the extra half hour as money
The step from sixty to ninety minutes is EUR 90, which is the same figure as the step from ninety to a hundred and twenty. Judged against the evening it changes, the first of those two steps buys considerably more than the second. Beyond two hours the character of the booking changes again rather than simply lengthening, which is a different decision and not a matter of getting more of the same.
Deciding without a conversation
If you cannot settle it, name the two lengths you are choosing between in the thread and take the longer one. Nobody is talked upwards here. The length is written down once, it sets the figure, and a booking already agreed can be shortened by a line sent before she leaves, which simply makes it a shorter booking at the shorter figure.