It's Wonderful said:
My, you have a very restrained wife! But then, something similar happened to me at a tango social. I had a very challenging dance with a beginner lead (also taking classes for less than a month) and after the song he comes to kneel in front of my seat, does the whole lips-pursed-and-hands-clasped-pose, and begins telling me all the little footwork mistakes I should really work on. :roll: And all I said was "hmm, thanks", but my defense is that I wanted to get dancing with anyone else!
Yes, she's a gem. However, as with all gems, there's fire inside! Sounds like you responded quite courteously as well. Here's to civility, a characteristic that is missing from much of society today, to it's detriment :<(