Ha! She totally called it.

And the horse, while definitely male as Kate can tell, is also speaking with a female voice inside her head.

And blind enough not to have noticed that glance.

<Yeah. I think you dropped this.> Not the makeshift bag of jacket and clothing, but after she noses in it for a moment, Rachel presents the map to the woman, held between powerful teeth.

She knows the voice. The woman's definitely familiar. And after a moment:

<Oh. Kate?>