So there seems to be some truth to the rivalry between Prince Harry's girlfriend Cressida Bonas and sister-in-law Kate Middleton, as another report claimed that the model thinks the Middleton sisters are "from the other side of the tracks."

According to Now Magazine, Bonas and her older sister Isabella Calthorpe, who also happens to be Prince William's former flame, can't help themselves calling the Middletons tacky.

Apparently, the tension reportedly stems from the Middletons not being an established family as the Bonas, with the former coming from a middle class background and the latter being a descendant of Charles II.

"There's always been a feeling that the Middletons are from 'the other side of the tracks' as they joke. Cressida's family has their own family crest going back through history, while the Middletons have just made up their own," a royal insider reported.

More than that, there have been long-standing rumors of Isabella and the Duchess of Cambridge not being too fond of each other since the beginning, because Prince William was supposedly "obsessed" with Calthorpe during their romance, before he got together with his now wife.

"Wills was said to be obsessed with Lady Isabella, who recently married Virgin heir Sam Branson, before he met Kate. So you can see there's been tension over the years," the source explained.

Meanwhile, it's not just Kate and Isabella who don't get along. Cressida, who has been dating Prince Harry in the last months, allegedly labeled Pippa as tacky for blatantly flirting with the eligible bachelor at the royal wedding.

Don't you think it's just a little bout of jealousy for Cressida there? Because who wouldn't have fancied laughing along with Prince Harry during that wedding? It's Prince Harry--the funny, charming, and amusing one of the royal brothers.

If the tabloids are correct, apparently, the Bonas sisters have got a lot of guts adding fire to the flame over their issues with the Middletons. The long-legged model and socialite is already speaking ill towards the future Queen of England, and she isn't even married to Prince Harry yet.

Well, whether these claims are true or not, we're going to bite the bullet anyhow because we know that sooner or later, the truth will come out.