Since you have now mentioned it, I would wait until you have a couple of massage reviews to post (and not mention FS)
I had the same experience recently and that's the approach I intend to take.
Mine was slightly different... I had managed to agree B2B despite other reviews saying it wasn't available (I think maybe I managed to negotiate the language barrier better) but despite an excellent time Inc RO which she obviously enjoyed, I was unable to cum, (it happens sometimes). I had already enquired about BJ, FK or FS (mentioned i had a condom) and been given a friendly but emphatic No.
We had both gotten dressed at the end, told her she was lovely and was joking that she had made me so horny that I was going to find someone to fuck straight after....
She seemed very disappointed that she hadn't managed to succeed in making me cum and without asking for any extra £ at all she pulled her leggings and knickers down, bent over the massage table and told me to be very quiet and fuck her.
On completion I was given a very passionate kiss and a wink and made my way out past the other customers who were having legitimate massage and beauty treatments with a rather large grin on my face.