Article continues below advertisementSarah Ferguson was reportedly driven by loneliness into the arms of Steve Wyatt - an alleged affair that led to her divorce from Andrew Mountbatten-Windsor."Steve Wyatt was the main reason for the breakdown of her marriage," royals expert and co-author of The Duchess of York Uncensored, David Leigh, told a news outlet on Monday, November 17.Article continues below advertisementFerguson's Affair Is Blamed for 'Breakdown' of Marriage Source: MEGASarah Ferguson and Andrew Mountbatten-Windsor were married from 1986 to 1996.