Royal Family
A royal source talked toPeopleabout the decision.
When Kate Middletonrevealed her cancer diagnosison March 22, she was seated alone on an outdoor bench.
Apparently, that was an intentional choice.

The royal insider added that despite Prince Williamsabsence in the video, hes been supporting her throughout.
It was thought that my condition was non-cancerous.
She and the prince needed time to process the news, the source added.

She needed time to recover from surgery and she needed time to tell the children.
That was the driving force.
source: www.bustle.com