Prince William and Kate Middleton Missing Lilibet’s 1st Birthday Was ‘No Intended Slight,’ Source Says

Prince William, Kate Middleton and other members of the royal family were all traveling

on the day Lilibet was celebrating her first birthday at home, but it wasn't to avoid it.

A source tells ET, the Duke and Duchess of Cambridge and other members of the royal family

that included Duchess Sophie and Prince Edward all traveled to different parts of the UK

to visit those who are celebrating Queen Elizabeth's Platinum Jubilee.

The source is adamant the events were not planned to avoid Lilibet's birthday at home.

"It's simply a coincidence they fell on the same day," the source said. "There was no intended slight."

It's easy to see why some might interpret it as much, especially since

the relationship between William and Harry appear to be quite cold.