So.....if I'm paying for an hour of her time does that include the time she spends getting ready (showing, dressing, make up, etc.) before I get there?
Obviously not.
So I'm not paying simply for an hour of her time, but for something else.
Probably for time spent actually with her, however that's used, chatting, coffee etc. would presumably be within that hour, at her discretion. But showering (unless accompanied), time alone, strictly speaking shouldn't be.
All within the reality that there is only a certain amount of time between bookings.
It's a complicated thing, so probably best to keep it simple.
Turn up on time, leave within time unless given clear indications otherwise.