The book was based on the secretly recorded conversations between the princess and her friend, James Colthurst, before her divorce from Prince Charles in 1996. “When we had William, we had to find a date in the diary that suited Charles and his polo,” Diana explained in Morton's book. “William had to be induced because I couldn’t handle the press pressure any longer, it was becoming unbearable. I knew Harry was a boy, and I didn’t tell him.”When Diana delivered their second son, Charles allegedly didn’t hide his disappointment. And interestingly, Prince William recently said the same about his own children.

Source: Fox News April 20, 2019 09:00 UTC