Assuming your marriage is indeed a valid marriage and not fraudulent, you will want to document as much as possible the good faith nature of your marriage.
Your question requires an attorney consultation. It is not a simple question that can be answered on this type of forum. There are many factors that would need to be considered and evaluated. Why is your marriage suspected of being fraudulent? Have you received anything in writing from USCIS regarding this? I strongly suggest that you contact an experienced immigration attorney for a face-to-face consultation and give him/her all of the facts surrounding your situation. He/she would then be in a better position to analyze your case and advise you of your options.
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