Good grief.......I never dreamed you would confront her last night! Don't you know you do nothing more than set off bells and sirens?
FWIW, never confront when you have no proof........or no plan of action.
If your gut says there is nothing going on, then go rest in peace. But for gosh sakes, stop harping about how her nice behavior messes with your head. If you feel it comes from her having no pressure, you're probably right.
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!