OP, you need to be clear in your mind about how it works. You book a punt, turn up, PAY the prossie, do whatever, leave. That's the end of it. If you want to leave a review then it is entirely up to you, the prossie should not have anything to do with the review and it certainly not up to them to decide who reviews her and where they put the review.
If it going to be a positive then she has nothing to worry about, she's a prostitute advertising on AW so the discretion argument has no credibility. Obviously you wouldn't post a load of personal details on her.
It's as bad as the prossies who put pressure on to get reviews, they think that in the heat of the punt the punter can be talked into it more easily.
If you want to leave a review so that others can decide on her then post a link and let us know if her profile is accurate, you don't have to go into a sordid porn style account of what happened - in fact most of would probably prefer that you didn't review porn style.