As the saying goes, nothing ventured, nothing gained.
In some cases, you will find that the girls take it in turns to work on reception, so if you ask, you may be told to come back on a different day when she is working. If you're lucky, she may even get one of the other girls to cover for her there and then. But equally, it is not unusual for parlours to be own or run by girls who have given up on the game, perhaps because they have got hitched, or to employ girls on reception in the same boat. In such cases, even if she is still seeing previous regulars, a newcomer will likely get a polite brush-off. But you won't know until you ask. It is highly unlikely that you will be the first to have asked, so unlikely that she will be shocked by the question, more likely flattered.
But probably best to ask out of earshot of the other girls working there, who may not take kindly to the receptionist taking work off them.