The Readers Digest reported some time ago that 50% of all husbands and 30% of all wives had participated in an extra-marital affair. In the book Secret Lovers, the findings were even higher:70% of all husbands and 50% of all wives. There are other factors that lead to divorce. We've learned all too well the affects. There are also many factors that lead to affairs. What do you think are the warning signs of a troubled marriage? 1. Lack of understanding; about your mate, about marriage.