Spanish Princess Letizia (C) and her daughters Infanta Sofia (R) and Infanta Leonor read a book in their official residence in Madrid August 1, 2012 in this picture released by Spanish Royal House. Spanish Princess Letizia celebrates her 40th birthday on September 15.[Photo/Agencies]

Spanish Princess Letizia talks with her daughters Infanta Sofia (C) and Infanta Leonor (L) in their official residence in Madrid August 1, 2012 in this picture released by Spanish Royal House. Spanish Princess Letizia celebrates her 40th birthday on September 15.[Photo/Agencies]