Others backed up their speculation of a rift by pointing to news that Prince Harry and Meghan are moving house from Kensington Palace - where Middleton and her husband, Prince William, also live - to Windsor Estate early next year.
The so-called "frictions" between the pair have apparently put "strain" on Prince William and Prince Harry, who have always been close.
Sources say that Kensington Palace has now launched a search to find out who the "mole" that is feeding these stories to the media might be. Kensington Palace also confirmed to HELLO! that Meghan attended Michelle's talk "in a private capacity" and that "they had a conversation after the event took place".
Despite reports that the Duchesses do not get along due to their wildly different personalities, the two women will have to put up with each other at Christmas, making the family reunion not so jolly.More news: Fed chair Jerome Powell softens line on interest rate rises
The duchess's mother, Doria Ragland, has reportedly been invited to join in on the festivities at St. Mary Magdalene Church in Sandringham on December 25.
Among the string of unflattering stories are reports of a feud between Meghan and her sister-in-law, Kate Middleton.
Thomas Markle, 74, is said to be "seething with anger" at "relentless criticism every time she says or does anything". This could be the flawless trial for the Los Angeles native, who is reportedly gearing up to make the move to London to be closer to her first grandchild, due next spring.
STAYING OVER: Meghan and Harry will stay at Kate and Wills' Anmer Hall (Pic: GETTY) TRYING AGAIN?
Per People, the palace does not usually respond to rumors and did not issue a statement regarding any other reports, including one that claimed Middleton, 36, was "left in tears" following a fitting for her daughter, Princess Charlotte's dress for Markle's nuptials to Prince Harry.
The Royal court has rubbished these rumours saying that the family will spend Christmas day together with teh Queen, but it remains to be seen if that is actually true.