The issue is whether your cousin and her ex-husband intended to establish a life together at the time they were married. It's the state of mind of each. Conduct of each before and after the marriage. Try to think of other indicators, change of address, change of name, affidavits from friends and family, ties to a church and an affidavit from the pastor, vacations taken together, plans for future vacations together, any joint tax return or was she listed on his tax return, life insurance policies, automobile insurance. Did he pay for her to get any type of schooling, language or career, you wouldn't invest in someone if it was a sham. Email communications, letters, or cards prior to or after the wedding showing their commitment to each other. Remember to be truthful at the interview and consistent in your answers, good luck.