Kate reached out to friend Princess Mary amid her own feud with Prince Frederik's brother.
Joachim and Marie's move to the US mirrored Harry and Meghan's 2020 decision.
Mary should be preparing to become queen but has dealt with family issues.
Kate and Mary first met in 2011 and share an easy friendship.
They both love sports, their kids, and letting their hair down.
Kate's guidance would be much appreciated as Mary is isolated from her longtime girlfriends.
Kate's advice to Mary is to support Fred as he feels like he's lost a brother.
Mary's situation is something Kate knows all too well.
Kate and Mary's friendship is based on trust and empathy.