It might all have been so different. Instead of living out her life under a cloud at Royal Lodge, Windsor, she could have been First Lady of America, lording it in lavish splendour in the Washington White House
The main conceptual idea is that Sarah, Duchess of York (Fergie) harbored a dream of marrying John F. Kennedy Jr. and becoming First Lady of the United States, despite him already being in a relationship.
The article explores this ambition, mentioning Fergie's enthusiasm about the prospect and the author of a biography on her who tried to warn her about JFK Jr.'s existing relationship.