Something that shows you're appreciation for the time, money, and effort that she puts into being the provider that you like:
* Gift certificate from The Bay or Holt Renfrew for perfume, body cream, make-up, etc.
* Gift certificate for a good Spa, pedi&mani, waxing, etc.
* Gift certificate for a session with a professional make-up artist.
* (If she tans) Gift certificate for tanning sessions.
If you know her enough to know more about her tastes:
* Tickets for a play, concert or other events that you think she will enjoy.
* Books, CDs from authors or artists she has mentioned or you think she will enjoy.
I don't think it should have to be very expensive.