Dont worry, just stay positive & focus on ur relationship proofs. Ask d copy of forms applied frm lawyer if u dont have already and remember the dates of events. Order GCMS notes if haven't applied, in the notes section the VO writes what he/she is concerned about, so u'll get an idea why they are having an interview. The notes are very helpful, u/ur spouse can apply them on ur own, dont need lawyer for that.
My friend is in India, I guess for d interview, she is Oct 2012 applicant. I guess I'll hear from her once she is back.