"It's always been my understanding that behind the scenes, Kate has tried very hard to forge a rapprochement and act as a peacemaker between William and Harry," Nicholl told ET. "She loves Harry. She says that she is the sister that he never had. She has been heartbroken to see them fall out, and I think she is one of the few people, one of the few family members who would actually be able to push the brothers together, which she did in a very subtle way, but was very effective."
"So much has happened," Nicholl noted. "There is so much hurt on either side."
"The idea that Harry's suddenly going to come around to William's way of thinking, and vice versa, I think is a way off," she added. "I think there do need to be more conversations, there's clearly still a lot of hurt, a lot of resentment, and a degree of mistrust on both parts. It's early days, but I think the hope is that come July -- when we are hoping to see the brothers stand once again shoulder by shoulder to unveil the statue in memory of their mother [Princess Diana] -- that the relationship will be stronger and in a better place."