Prince William is the latest royal to suffer from a backlash from the media after a magazine claimed that he had allegedly cheated on his wife, Kate Middleton.

According to an article from In Touch Weekly, Kate Middleton, was pregnant with their third child, Louis when William allegedly cheated on her.

But William has set his lawyers on the mag in a bid to quash the rumor mill:

“In addition to being false and highly damaging, the publication of false speculation in respect of our client’s private life also constitutes a breach of his privacy pursuant to Article 8 of the European Convention to Human Rights,” attorneys with London law firm Harbottle and Lewis, said in a letter that was sent to at least one British publication after the release of In Touch Weekly‘s cover story, according to the Daily Beast.

According to In Touch, Prince William cheated on Kate with their aristocratic neighbor, the Marchioness of Cholmondeley, Rose Hanbury. 

A source told the outlet that Kate “immediately confronted” William upon learning about the alleged affair, but he “laughed it off saying there was nothing to it.” Kate then reportedly told William to stop socializing with the Cholmondeleys. 

“Kate sees their friendship in an entirely different light now,” the source said, adding that she’s since lost trust in William. “They come across as a perfect couple who can do no wrong,” the “insider” also told In Touch. “But the reality is, most couples have their issues and William and Kate are no different. [The scandal] has rocked the palace and their marriage.”

“The use of a legal letter by William as a future king is very much a move of last resort,” Duncan Larcombe, former royal editor of The Sun, told The Daily Beast, adding, “If the stories of Kate freezing Rose out are true, then whatever caused the falling out must have been very serious.