Princess Isabella and Prince Vincent knew just what to do when their mom stepped away to address the situation ...

The King and Queen of the Ring finals will take place at Night of Champions on June 28 at the Kingdom Arena in Riyadh, Saudi Arabia. The event will begin at 1 p.m. ET.

PEOPLE looks at Prince William and Kate Middleton's upcoming royal roles in a new special issue, PEOPLE William & Kate: Future King and Queen, out May 23.