This happened to some extent to Quarterback Aaron Rodgers and Olivia Munn.
Families see this all the time.
Some woman gets her hooks in, exploits cracks, makes it all about her, alienates person even further from family
Nothing families can do until it hits the fan.
And so as not to appear sexist..it happens with Men playing that role too. Seems to me happens more with females doing it.
This really is a tragedy for the poor kid of Diana. He just doesn’t see it yet. No doubt THE Queen and the two future Kings see the disaster waiting to happen to the hapless halfwit.