Article continues below advertisementMeghan Markle is said to be privately reassessing her public strategy after a highly visible Christmas display by Kate Middleton left the Duchess of Sussex feeling she cannot compete with what one source told OK! represented the peak of the future queen's "unassailable brand of warmth and duty."The moment came after Kate, 44, returned to public life following cancer treatment to lead her annual Together at Christmas carol service at Westminster Abbey, an event broadcast on ITV on Christmas Eve.