Kate Middleton was spotted enjoying time with Prince William and their three kids, Prince George, Princess Charlotte and Prince Louis, as she battles cancer. “The Mail understands that the princess has been seen out and about more with her family in recent weeks,” Daily Mail reported. However, the future queen’s time in public went under the radar, as civilians failed to snap a photo of the royal. In March, Kate returned to Instagram to update fans on her health after months of conspiracy theories spreading online. “I wanted to take this opportunity to say thank you personally for all the wond…