It is not known what drives married women to cheat on their husbands.
According to AshleyMadison.com, which is considered to be a notorious dating website for "casual encounters", a woman is more prone to cheat at certain stress points in her life, notably right before turning 40, ABC News reported.
Women also say hat they cheat because they're missing something, don't feel loved and emotional void, rest say that they cheat for the thrill of it.
Statistics have shown that 21 percent of married men have had an affair, compared to 15 percent of married woman, according to the National Opinion Research Center's General Social Survey.
However, number for women has spiked in the last two decades, up nearly 40 percent.