And it was all because Meghan was not allowed to wear her first choice tiara, when officially becoming the Duchess of Sussex, The Sun reports.
According to the source, Markle and Prince Harry are considering their options.
Putting a large emphasis on family during the interview, the 63-year-old revealed that no matter what, she always puts them first.
"What I'd say is that there's so much opportunity to do good with a platform like that - and I think Meghan can maximise her impact for others, as well her own happiness, if she's doing something that resonates with her personally", Mrs Obama told the magazine. She cried as she declared that she missed her dear friend, Di.More news: New Zealand dominate in Dubai
Meanwhile, Meghan Markle's father has reported condemned the the "cruel and heartless" attacks on his pregnant daughter by blaming British "snobs". Speaking to Express.co.uk, she said: "It is probably a minor miracle that the two women get on as well as they do". Royal correspondent Richard Palmer has written, "It is clear that Meghan is regarded as hard and demanding by some in the family and on the staff". In late October, the Sunday Times' reported that the two were making plans to split their shared Kensington Palace household, which means creating two separate courts with separate staffs "to reflect their increasingly different responsibilities".
The source explained: "Her and Kate fell out when she b******ed Kate's staff".
A Kensington Palace spokesperson has taken the unusual step of commenting on the so-called "feud" between the Duchess of Sussex and the Duchess of Cambridge. She was a skilled professional who had previously worked for X-Factor judges Robbie Williams and Ayda Field.
And while I guess she has a point, attending a royal wedding and being friendly with the queen sounds VERY awesome, and I would not be able to keep cool as well as Carole clearly has been.
The former Suits actress is reportedly considering giving birth at home.