Prince William is delighted that people are enthusiastic about Catherine, says royal expert. The heir to the throne does not want to be degraded to a superfluous marginal figure.

The popularity of the Princess of Wales is said to be "worrying" for the royal couple. Kate and William's blessing of the house also hangs awry, but thanks to Catherine's balanced nature, the situation never escalates, says author Tom Quinn. "Kate treats him [William] like the fourth child because he is prone to tantrums," says Kensington Palace employee.