If she has not been approved for residency yet, you need to consult with an experienced immigration attorney to determine if her classification allows for derivatives. It may not matter that you were not married when she filed or it may matter a lot. Much more information is needed. Go see an immigration attorney.
I agree with my colleague. Additionally, depending on how she was petitioned, a marriage could disqualify her from immigrating.
You should retain an experienced immigration lawyer to review all the facts and advise you accordingly.
J Charles Ferrari Eng & Nishimura 213.622.2255 The statement above is general in nature, as not all the facts are known. You should retain an attorney to review all the facts specific to your case in order to receive advise specific to your case. The statement above does not create an attorney/client relationship.