>> reporter: in november of 2017, harry and meghan announced their engagement. >> kensington palace announcing the two are set to wed in spring of 2018. >> reporter: and the royal family welcomed meghan, with open arms. >> the queen made an exception and broke from royal protocol. and invited meghan to spend christmas with the royal family and the queen. that was the first time a royal fiancee has ever done that before actually marrying into the royal family. >> reporter: a powerful sign the monarchy and the queen were modernizing and changing. >> the royal family, now, is trying to at least be much more -- society. and the queen, first and foremost, wants her grandson to be happy. >> when we come back. tension in the royal family. >> william looked at harry moving very, very quickly towards marriage. and said, hold on a minute. are you sure?