Yeah I don't think telling people is a good idea, but in this case I'm sure she already knows. How man men go to spas? How many get pedicures? Also you're relationship is that of client and service provider and in those situations you pretty much hold the power, they realize that you could take your business elsewhere and their job is to please you. I can't imagine a problem with telling them unless it was some kind of super conservative salon. I think that you could make this into your girl sanctuary. For example, if you wanted to experiment with a public outing some day this could be the place to do it.
Good luck.