Kate Middleton Pippa Middleton
Kate Middleton and Pippa Middleton are allegedly clashing with each other Reuters

Kate Middleton is allegedly not in good terms with her sister, Pippa Middleton after her engagement. It was recently revealed that the 32-year-old is engaged to her boyfriend James Matthews.

According to InTouch Weekly, Pippa is unhappy with the Duchess of Cambridge's attitude. A source said: "After years of private drama, clashing views about courting attention and fresh concerns about a wild brother-in-law-to-be, Pippa doesn't want Kate in her wedding party. She's fed up with Kate's judgmental attitude, and doesn't want her to be a bridesmaid unless she starts to chill out."

The insider added: "During a heated discussion, Kate expressed how unhappy she is because of James 'uncouth' family connections. She believes they will try to cash in on the royal family. Kate goes out of her way to portray herself as the perfect princess and is petrified the fame-hungry Pippa is going to ruin everything."

Meanwhile, Pippa is extremely happy over her engagement to Matthews. A source told E! News: "They've always had sizzling chemistry. He's now 40 and ready to settle down. She's over the moon as she definitely didn't expect an engagement so soon! While there is talk the wedding could be next year, Pippa has always been keen that her own nuptials are very different to her sister's."