Well, it's hard to know what was up with her. My guess is that she was wondering what was up with you. . In the past, would she search for eye contact with you? And if so, would she do this to relay some silent message? If that's not it, then I'd say she is curious about what you are doing.......which is a good thing.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!