Gee whiz!
That lady has done a lot with that horse. You'll never convince me that horse doesn't trust her to the max and that she hasn't earned that trust.
Loved to see it. Helluva lady, helluva horse!
(As a mammal who has lived in a close symbiotic relationship with a series of mammals of another species for quite a while I firmly believe they communicate very well, understand pretty well, and do the best they can with the tools they have. And have a quality of spirit which puts humans to shame.)
Arf