The mother of two, who gave birth to Prince Oscar just four weeks ago, was seen attending an official engagement after just 27 days of maternity leave, despite the fact Sweden allows a total of 476. The wife of Prince Daniel of Sweden attended a a lecture given by UN Secretary General Ban Ki-moon at the Stockholm City Hall last night. However, the royal looked as though she may have been kept up by her newborn as she appeared to almost nod off during Ban Ki-moon's speech.