Spain's royal family has long enjoyed a level of privacy and respect that the Windsors could only dream of. But, in an uncomfortable first for the Madrid monarchy, one of their number will face questioning from a judge this week in a scandal which has rocked the royal family and raised questions over the future of the monarchy. Inaki Urdangarin, the son-in-law of King Juan Carlos, is preparing for a court appearance in which he will defend himself in a widening embezzlement scandal. Hearings into the case began last weekend at a court in Palma on the Balearic island of Majorca and will culminate on Saturday with the long anticipated appearance of the Duke of Palma, who received the title when he married Cristina, the King's youngest daughter, in 1997. The Duke, 44, a former professional handball player who won Olympic medals for Spain in the sport, was formally made a suspect in the wide-ranging fraud case that alleges the embezzlement of millions of euros of government funds through a non-profit organization he co-directed between 2004 and 2006. Investigators claim to have discovered a "black hole" in the accounts of the Noos Institute, which organised sporting and tourism events for the regional governments of the Balearic Islands and Valencia.