It was jealousy at first now I'm creeped out!?

all it sounds like to me is you should feel lucky to have such a good trainer, you can get a horse to do almost anything if you understand them, read there boddy language and know how to act in situations.its not freaky its probly just that this trainer realy knows what shes doing, she has probly been with horses her whole life,and has learned to understand them.