@Mims0, I'm pretty sure you're talking about your guest Cara, who was at your place before and whom you invited to come back and ride your horse. Still, that is no invitation for somebody else even to just go at it without asking you for permission! So sorry she took advantage of your giving nature.
interesting that her second review was short, not mentioning any of all the extra goodies you provided her with. That already tells a lot. Just goes to show that we hosts always need to carefully guard our boundaries - and speak up, which you actually did regarding the horse. (and that's why you got the 4 star review this time, I bet).
I don't think she will be back - she knows she caused you grief and offering money as she did is inappropriate. But in case she wants to come back, don't let her. There are much more appreciative guests out there for you, you don't need her.
Too bad you didn't say anything about any of this in your review of her, that would have helped future hosts to avoid such a manipulator. If there is still time, I would perhaps post a short response on your own page under her review, very polite, short, with the right wording to clarify the picture just a bit.