From my experience over several in calls with Mary, she is careful about hygiene and simply would never bareback. From conversations I have had with her, I know that she does get very tetchy with wankers who mess her about - wankers turning up way after booked time or timewasters who don't turn up at all. On one occasion she told me she had had loads of no shows that morning and was understandably pissed off. She told me has also had a lot of (predominantly Asian, she said) blokes who book, turn up, ask to see her tits, don't pay, then go back to their cars, presumably for a wank while the memory of her is fresh. I know she can also get a bit tetchy with guys who don't understand directions to her place (although from personal experience I know that these aren't always clear, and she should realise that the Thai accent isn't always easy to process, specially if you're dealing with background/traffic noise).
My guess is that her occasional tetchiness or not suffering fools gladly has led at least one of those fools to seek revenge by claiming she offers bb or giving a negative review.
