"Happy Birthday to our first lady (and my incredible step-mom!) Melania Trump," Ivanka captioned a photo of Melania and President Donald Trump. "A wonderful example of kindness and grace for us all! @FLOTUS." 

Ivanka's message for Melania came after Sunday's report on Vanity Fair claiming the two women have a frosty relationship. The report, citing two unnamed sources, said Ivanka and her stepmother have had cold interactions with each other. However, a White House spokesperson dismissed the rumors, telling the Huffington Post Melania and Ivanka have always had a close bond.

Trump's wife received the disapproval of many Americans when it was announced she will live in New York with her son Barron, while Ivanka was often seen working closely with her father. The first daughter also took on a larger role in her father’s campaign than Melania did.

While she continues to live in New York so her 10-year-old son can finish the school year, Ivanka moved to Washington with her three children and husband Jared Kushner. 

“Melania is an unbelievable mother. It’s pretty uncommon for wives of candidates to not be on the campaign trail every day. And she made a decision I totally respect, which is that she has a young son, he needs stability, he needs routine,” Ivanka told People in July 2016 of Melania's decision to fly under the radar. “My father’s traveling so frequently, and she is an unbelievably consistent, loving and reliable figure in Barron’s life.”

Ivanka also commended the first lady’s work with charitable organizations and said: "Melania is very smart, she’s very warm, she’s got an incredible heart."