You know your spouse better than I do.  You are the best judge as to what their potential behavior could be throughout the immigration process.  The immigration adjustment interview for conditional green card removal interview is a crucial part in obtaining or keeping your green card.  If your spouse fails to show up to the interview, your case will be denied, if your spouse sabotage is the interview, is rude to the officer, does an answer questions crackly, and ”forgets” vital part of the relationship, they will be a significant chance of denial and your credibility and that of your spouse will be in question for potential marriage fraud, which carries civil and criminal liability and a lifetime bar to any future immigration benefit for you, the immigrant. 

If you have a pending a green card case based on marriage to a U.S. citizen or permanent resident and are represented by an attorney, if your marriage starts to fall apart, anything you tell your attorney will likely be related to your spouse.  Although you benefit from attorney client privilege when it comes to people outside of the attorney’s office and CIS, the immigration attorney in your marriage case represents both of you. You are both his or her client so if the attorney learns something about one spouse that would benefit or hurt the other spouse, the attorney has an obligation to inform the other spouse.  If the marriage is not going to work or you worry about what could be said to your spouse, I strongly suggest that you and only you consult another immigration attorney about your situation to determine your options, the timing of the breakup (before or after the green card interview), whether you are contemplating divorce, the potential conditional nature of your residency even if your spouse is cooperative through the process up until the interview and other factors that could affect the outcome of your case.