Nonetheless, Charles still does harbor resentment toward his younger son, especially due to his "criticisms of Queen Camilla [in his memoir, Spare], as well as his broader attacks on the family and institution, which have seriously crossed a line for the king and those closest to him," Fordwich said.

"The king is now so puzzled by Harry’s constant revelations. It’s now beyond sensitive to discuss, so he avoids all interaction regarding the subject," she continued. "He is so kind but overwhelmed and has quite enough on his plate to deal with, without all this from his son."