I’ve done this where I’ve asked one of my favorite provider (independent) if she is willing to see a female “friend” also masseuse at a spa (lol) who wanted to experience a FBSM from a female provider.  The independent provider accommodated my friend. She had champagne and strawberries for her as well.  The independent asked if my friend wanted anything specific and if she wants oral (lol). I told her I didn’t know.  The independent had my friend shower with her and gave her an amazing FBSM experience.  My friend went back to her a few more times 😁.  

My only concern sometimes having a partner is if she’s testing you and wants to know who you’re seeing “on the side” for FBSM or VIP.  That’s why the agencies I use don’t allow couples because they don’t want a jealous partner to now know their location and cause problems 😂

For me personally, I would not introduce my partner to my  hobbying world.  Too risky!  Not if she wants to bring a female over and have a threesome fun, I might be game because she initiated it 😁