William and Kate Middleton “not as perfect as it seems”: Inside their rocky relationship

A friend of Kate’s said, “She’d had enough and gave him a serious talk. She told him he was making her look bad. She’d dealt with girls chasing him for years and at first thought it was funny.”

Some believe neither had full control over the split. Royal author Christopher Anderson, who wrote about their love story, claimed William’s stepmother, now-Queen Camilla, might’ve played a part.

Anderson, chatting with The Daily Beast in 2016, said, “I was in London when they broke up. I was shocked! Everyone thought a proposal was coming. Then I heard Camilla was involved.”

Speculation still crops up. Last year, former royal correspondent Judy Wade offered a new theory.