In 1995, Diana sat down for a tell-all solo interview with journalist Martin Bashir to talk about the immense pressures of public life and her struggles with self-harm, postpartum depression, and bulimia. She also revealed that she knew about Charles' affair with Camilla. ("There were three of us in this marriage, so it was a bit crowded," she famously quipped.) And Diana even admitted that she'd been unfaithful to Charles, saying that she had been "in love" with James Hewitt, her riding instructor.
A few weeks later, the Queen herself urged her son and daughter-in-law to divorce, and the following year, they made it official. Charles and Camilla, on the other hand, wed in 2005 and are still together.
Source: BBC, New York Times, TIME