The short statement issued by the Palace did not supply further details. Spokeswoman Rafike Yilmaz told the Belgian press agency Belga that it's a private matter.
Paola is turning 78 next month. Reports earlier this week said that Albert and Paola would resume official activities after 4 months of rest. They would go to Venice for the Biennial next week. Albert abdicated as the 6th king of the Belgians on 21 July 2013.