"Kate has only just given birth to Prince Louis and was feeling quite emotional, though just what upset her is unclear", a source claimed to veteran royal reporter Camilla Tominey of The Daily Telegraph, which confirmed separately that the pre-wedding incident did happen.
Usually it is the norm for royals to exchange gifts on Christmas Eve - with joke presents.
Harry allegedly once gave his grandma a shower cap which said "ain't life a b****" on the front.
The unflattering stories have led some to dub Meghan "Duchess Difficult" because of how demanding she reportedly is.
The pair has been the subject an alleged rift - with rumored reports of various disputes.
Duchesses Kate Middleton and Meghan Markle joined their husbands for Christmas Day Church Service on Tuesday (December 25) at Church of St. Mary Magdalene on the Sandringham estate in King's Lynn, England.
Hundreds of well-wishers had braved the cold conditions to see the "fab four".
Next year, the royal family will be slightly larger on Christmas Day, as Markle and Harry's first child will be born in the spring.
What did you think of the Queen's speech this year?
Pre-recorded and shown at 3 p.m., the Queen has done a televised Christmas broadcast every year since 1957.
She said the photo was like a "lottery win" after she posted it on social media and it went viral.
After dinner comes charades - a reported favorite of Her Majesty.
Among the crowds this year was Karen Anvil, 40, from Watlington, Norfolk, who managed to snap a great picture of the Royals smiling as they left church last Christmas Day.