parents not being present at the time of wedding is not necessarily a red flag...if you provided documents to prove that relationship is genuine, you should be ok...at the time of interview, problem occurs when visa officer with his old fashioned traditional views does not give a chance to explain the circumstances of parents not being present and show documents to prove that relationship is genuine..there are cases like yours in this forum who were not asked to appear for interview and visa office granted visas without questions...