Conversation so far:
WasPrince Bernhard of Lippe-Biesterfeld married?
Prince Bernhard of Lippe-Biesterfeld married Wilhelmina Helena Pauline Maria.
Who was Prince Bernhard of Lippe-Biesterfeld married to?
Prince Bernhard of Lippe-Biesterfeld was married to Princess Juliana
Did Prince Bernhard of Lippe-Biesterfeld and Princess Juliana any children?
Prince Bernhard of Lippe-Biesterfeld and Princess Juliana had four children

Question: Did either him or Juliana have children outside of the marriage?
Self-contained rewrite: Did either Prince Bernhard of Lippe-Biesterfeld or Princess Juliana have children outside of the marriage?