Prince William and Kate Middleton are reportedly in a rough patch in their marriage.

Kate claims William did not defend her properly from Prince Harry's book 'Spare.'

William and Kate have allegedly been having serious arguments and trading insults.

The book 'Gilded Youth: An Intimate History of Growing Up in the Royal Family' may shed light on their relationship.

William pushed Harry to the floor during an argument about Meghan Markle.

William called Meghan "difficult," "rude," and "abrasive," while Harry fired back.

The fallout from the book has been long and serious for those involved.

Despite the alleged rough patch, William and Kate always appear regal when out and about.

The severity of their alleged fallout has not made it into the public eye.