The Prince and Princess of Wales 'nightmare' five years could either 'break' their relationship or bring their marriage ...

The Prince and Princess of Wales have stuck together through family deaths, turmoil and her cancer journey in recent years ...

The Prince and Princess of Wales have stuck together through family deaths, turmoil and her cancer journey in recent years Aaron Chown - WPA Pool/Getty Kate Middleton and Prince William have stood ...

Prince William and Kate have weathered a storm of ... “The last five years have been a nightmare for them in every possible way, and the past year even more so. That either crushes a marriage ...

Kate Middleton and Prince William are stronger than ever ... “The last five years have been a nightmare for them in every possible way — the past year even more so. That either crushes ...

“The last five years have been a nightmare for them in every possible way—the past year even more so.” Of last year, Jason Knauf, William and Kate’s former private secretary, told 60 ...

For Prince William and Princess Kate ... She added, "The last five years have been a nightmare for them in every possible way—the past year even more so. That either crushes a marriage, or ...

William, 42, has remained by his wife's side as a steady source of strength. Royal historian Amanda Foreman exclusively tells PEOPLE in this week's cover story, "There is a sense of protectiveness and ...