As I see it, it could either be a normal reaction to something percieved as fun (I though making steepturns used to be a blast!), or an slightly abnormal reaction to stress.
How are her reactions otherwise? Does she seem to be confident, motivated and enjoying the flight? Or does she sweat, perform seriously sub-standard, and show other signs of being stressed?
Let's hope for the first one. Good job on the CFI in that case
