I honestly believe that you overthinking this whole thing. If the two of you got married and love each other and you have provided all the documentation that they have requested, then any question that they may ask is really not to be rehearsed and answered from the heart. I have to believe that the reason why your spouse wants to be in the US is to be with her spouse and all else is secondary. Obviously your spouse wants to work, stay home, study or whatever the answer should be what it is and not rehearsed. My spouse went to the interview and we did not study or rehearse anything, they asked a whole of 3 questions and said congratulations your visa is approved and that was that, all in all less than 5 minutes at the window with the Embassy official.