I remember your other post about sponsoring your kids from Nigeria. You fraudulently obtained your GC and US citizenship by deceiving your wife and US govt so the worst for you is denaturalization and possible deportation. Only a judge can denaturalize you after USCIS opens a case against you. Has your ex-wife contacted USCIS about the fraud yet? If so, you just have to wait till you hear from USCIS. Denaturalization involves a trial in federal court so USCIS will need time to examine the case carefully with their lawyers so nobody can tell you when you will hear from USCIS.
I think you are going to be found out at the interview stage when your kids cases gets to the consulate for interviews. Good luck.