Kate Middleton and Prince Harry have always had a soft spot for each other. But now there are claims that their special bond will take years to repair.

Prince Harry made a string of allegations against Middleton in his memoir Spare. The Princess of Wales has not directly responded to her brother-in-law, but a source told Life & Style that the mom of three is upset.

“Kate had taken Harry under her wing and told friends he was like a brother to her. She thought their bond was unbreakable. While Kate insists she’ll always love Harry, it will definitely take work to repair their relationship after Spare’s release,” the source said.

The source said that Prince Harry and Middleton remained close up until the former wed Meghan Markle. In fact, when the Duke and Duchess of Sussex were still dating, Prince Harry also confided in Middleton.

And every time Middleton and Prince William faced a problem in their marriage, Prince Harry was always there to comfort her as well.

“For instance, Harry would open up to her about his pre-Meghan dating life and when Kate would have issues with William, Harry was one of the few people she could turn to for advice,” the source said.

But Middleton saw Prince Harry’s memoir and his Netflix documentary as the ultimate betrayal. So for now, the Princess of Wales wants nothing to do with her brother-in-law and his wife.

“It takes a lot for her to lose her cool and that almost pushed her over the edge. She resisted. The way she sees it, anger is like swallowing poison and expecting the other person to die,” the source said.

However, one should take the tabloid’s claims with a grain of salt. Middleton has not released a statement regarding Prince Harry’s memoir and Netflix documentary.

As such, no one knows how she feels about her brother-in-law sharing intimate stories about their relationship.

However, it is also important to note that Prince Harry also said a number of positive things about Middleton. For instance, he called her lovely and said that the Princess of Wales was more like a sister than a sister-in-law to him.

Unfortunately, their relationship soured following Middleton and Markle’s feud. Even though they have already forgiven each other, Prince Harry and Middleton’s relationship never returned to how it was before.