In a case like that, then I found clients who used to use this technique the most polite:
You: "Do you have any restrictions?"
Lady: "I don't do X,Y, and Z."
At this point, she has already opened up the discussion about specific services, so you're now free to ask her specific questions too. If she didn't answer or says something like "I only discuss that in private" -- then that too is an answer which you're free to interpret. She may be too shy for the services you're looking for.
I generally follow something similar and only inquire about specific services after rates and restrictions have been provided and I still have any uncertainty, but I do see what you mean about letting her be specific first. I'll give that a try.


