Article from Antena 3:
http://www.antena3.com/a3noticias/
Nobody suspected that this protocolic image in the perron of the Palace of the Zarzuela was going to turn out to be the image of the day. The Kings, the Princes of Asturias and the Dukes of Palm received this noon to the President of Portugal and his wife.
A habitual greeting that has become the news when knowing itself in the evening that Doña Letizia is pregnant with her second child. All the again pending eyes of the Princess of Asturias and the gestures of affection and support of the Prince. And it is that in the pregnancy of Infanta Leonor Doña Letizia underwent the own incomodidades of a pregnant woman who, of course, in this occasion nobody has suspected. Not even the journalists, always pending of any revealing detail, guessed the state of the Princess of Asturias.
Everone knew that the Princes looked for a new pregnancy, but nobody suspected that the news would take place so fast. The past Friday, crossed the newspaper "La Razon" and shared food with the writing. The Princess was talking about the maternity, about how she tries to arrange his official duties with the dedication to her daughter Leonor, even, very was commented the good appetite that demonstrated the Princess during the lunch. But nothing that indicated her pregnancy. On Tuesday we saw the Princess dressed in black, very serious, perhaps at the moment, but also by the usual annoyances of the pregnancy. The congratulations have arrived very soon, of the first the one of the president of the Government and from the leader of the opposition, Mariano Rajoy, who has said that the pregnancy is a reason for joy for all Spaniards.
And another article from terra:
http://actualidad.terra.es/nacional/articulo/principes_felipe_hijo_deseos_don_1106077.htm
The second child of the Princes, more near desires of Don Felipe.
The birth of the second child of the Princes of Asturias is more near desires of Don Felipe, that the day of engagement at then which dońa Letizia became his fiancee, expressed his intention to have “more than two and less than five” children.
Infant Leonor was born the 31 of October of 2005. She is the first daughter of Don Felipe and dońa Letizia, that god married in May the previous year.
For want of little more of a month so that Infanta Leonor turns one year, the Real House has made official statement of the second pregnancy of the Princess Letizia, whose second child foreseeably will be born in May of 2007.
Therefore, if they turn the well-known calculations today, when dońa Letizia gives light for the second time are fulfilled three years since they married in Madrid.
“Over two and below five” children
In this way desires of Don Felipe are become reality, that the day of the engagement with Letizia Ortiz answered one of the many questions of the attending journalists with the following phrase: “More than two and less than five” children. The press wanted to know how many children would have the pair, an importance question, every time the heirs of Don Felipe and dońa Letizia are called to continue the monarchy.
Don Felipe could not disguise the smile when it expressed his desire, just as dońa Letizia, to that escaped a “Ąanda" to him.
The Prince of Asturias has reiterated in several occasions his desires to form a family.
The 3 of November of 2003, two days after its commitment with dońa Letizia was known, said that she was the woman with whom he wished “to share” his life and “to form a family”.
In Oviedo, few months after contracting the marriage, Don Felipe affirmed in the presence of his wife whom it loved “to construct a home, to form a family and to share the beautiful eagerness to serve to Espańa with total delivery”.
IMO we were very alarmed and worried by letizia's thiness. 
