Kate Middleton, the Duchess of Cambridge is reportedly upset with Prince Harry relationship with Cressida Bonas.

The 28-year-old royal was seen cuddling the 24-year-old model last month while skiing in Verbier, Switzerland. Ironically enough, Bonas is the half-sister to Prince William's former girlfriend, actress and model Isabella Anstruther-Gough-Calthorpe.

Bonas has reportedly told Prince Harry to cut all ties with Kate's younger sister Pippa over fears that their friendship is too flirty.

"Kate wasn't happy when she heard what Cressida said," a royal source told Now magazine, "She told Wills, who had a word with Harry. He told him they were concerned that Cressida's walking all over him."

"Kate knows Harry and Pippa have only ever been friends, but she likes that they have a jokey, flirty relationship and 
sees that Harry enjoys it," the insider added, "She 
was really upset when she heard Cress was trying to control who he talks to. She's very protective of her brother-in-law and is worried he'll get hurt."

Prince Harry, who has been voted among the world's most eligible bachelors, dated Chelsy Davy two years ago. Later, he shared a brief fling with Jenson Button's former girlfriend Florence Brudenell-Bruce.

Last September, he had talked about tabloid rumours circulating his personal life.

"Of course I read them," he said, "If there's a story and something's been written about me, I want to know what's being said. But all it does is just upset me and anger me that people can get away with writing the stuff they do. Not just about me, but about everything and everybody. My father always says, 'Don't read it'. Everyone says, 'Don't read it, because it's always rubbish'."