Former royal Sarah Ferguson watched the royal wedding alone in the jungle in Thailand while her daughters Princesses Beatrice and Eugenie — in much-maligned outfits — attended the ceremony with their father, Prince Andrew. “I sort of wore a hair shirt and beat myself up most of the day thinking and regretting, why did I make such a mistake?” the Duchess of York told Oprah Winfrey on Tuesday. “It was so difficult,” she said of the snub. Ferguson, who was not invited after she was caught on tape at tempting to sell access to her ex- husband last year, said, “It was so hard because the last bride up that aisle was me.” She added: “I really love the feeling that sort of [Princess] Diana and I both weren’t there.”