. >> reporter: authors anne milford and jennifer gauvain say 30% of women knew they were marrying the wrong man on their wedding day. >> on the day, they're going, oh, my gosh, what am i doing? >> reporter: they should know. they penned the book "how not to marry the wrong guy." >> it doesn't matter who the groom is. if you are more caught up in the party planning, details that might be a sign that you are married the wrong guy. >> reporter: they say while kardashian may be famous, her distorted vision of marriage is part of a new trend. where did kim go wrong? >> she ignored her gut feeling. >> reporter: they've uncoverered the top reason women forgo their intuition and say i do when they are really thinking i don't. rationale number one, i don't want to waste the time i have invested in this relationship. number two, all my friends are getting married. i don't want to be alone. number three, he'll change after we get married. and number four, it's too embarrassing or expensive to call it off. but they say the biggest blind spot of all is wedding planner fever. take 31-year-old divor