During the 1980s, Maiko Lee lived in Paris as the mistress of Vere Harmsworth, 3rd Viscount Rothermere, proprietor of the right-wing Daily Mail newspaper. The couple finally married in December 1993 following the death of Lord Rothermere's first wife, Beverley Brooks, a former actress, in 1992. Since her husband's death in 1998, Lady Rothermere has used the style The Dowager Viscountess Rothermere.
She is currently Chairman of the Patron's Circle of the Philharmonia Orchestra and also endows the Co-Principal Cello's Chair. Lady Rothermere is also a keen supporter of the study of Korean art and culture at the University of Cambridge's East Asia Institute.