This weekend, we’re talking about cheating, in big business, in relationships and even by accident.  Guest host Lisa Desjardins of the PBS Newshour speaks with former CFO of HealthSouth, Aaron Beam, about what happened to a cheater during one of the biggest accounting scandals in history. Duke professor and dishonesty expert Dan Ariely explains why we cheat. Lisa talks with the founder of infidelity dating site Ashley Madison about the business of cheating, and a Google hacker explains how hackers cheat…for good. Three listeners tell their stories of cheating in their own financial lives and one test drives a Cadillac he can’t afford, just to get bonus gift. We talk about cheating by accident with an accountant working on healthcare taxes. On next week’s show, we’re talking about mobility. How is the American Dream working out for you? Do you feel upwardly mobile? Tell us your stories. Write to us here, on the web, or tweet us @MarketplaceWKND.