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.Source: ANI << Wedding Guests Have Tough Time Selecting Gifts Jimmy Choo's Sole Couture Line >> Recommended Reading Infidelity Infidelity is no longer seen as a midlife crisis alone because younger people are beginning to cheat on their spouses READ MORE US Man Faces 5-yr Prison Term For Reading Wife's Emails Secretly To Confirm Infidelity A man in the US is facing up to five-years in jail after he read his wife's emails without her permission. READ MORE Infidelity may Lead to Weight Loss? Being unfaithful to your partner can have a surprising benefit, especially for those struggling to shed those excess pounds. READ MORE Is Life Better Staying Single or Getting Married? The stigma linked to staying single is gradually disappearing. More people opt to stay single and many even claim to be happier. But there are both advantages and disadvantages to staying single. READ MORE Most Popular on Medindia Find a Hospital Nutam (400mg) (Piracetam) Hearing Loss Calculator More News on: Is Life Better Staying Single or Getting Married?