I just finished re-reading Wise Man's Fear and in the meeting with Denna at the river it seems like Denna knows what Kvothe is thinking. Kvothe is thinking about how to convince Denna to leave Master Ash. Before he can say anything, Denna cuts him off and starts talking about how Kvothe was whipped by the University. It seems like she has gained the ability to know what Kvothe is thinking.
One thing that has never been explained is why Denna, in the middle of the book, asks Kvothe, Sim and Wil about magic and later she and Master Ash go to Yll, she learns knot-language. In my theory, she has gained a kind of magic.