If she didn't ask you to get the room, or she has an extra charge posted on her web site ( if she has one ) then she should be covering the costs

If a provider bills her services as "incall", and you are not flying her in from another city, then it is always assumed that the room cost is her responsibility.

If you are flying in a provider to stay at a hotel, unless she is placing ads to see other clients while in town, the responsibility becomes yours, even if you can't stay for the night because of the home fires, etc.

Just curious, why would you post a simple question like that under an alias?