Melania Trump and Ivanka Trump are cordial but not close.

CNN’s Kate Bennett shared new details about the first lady in her book “Free, Melania: The Unauthorized Biography” that is set for release on Tuesday. Among the things that Bennet covered is Melania’s relationship with Donald Trump’s daughter, Ivanka.

The first lady of the United States reportedly felt that her daughter-in-law is “invading her turf” with constant international trips.

“The trips were, according to a source, too close for comfort for Melania, who thought Ivanka was invading her turf,” Bennett wrote.

She added that Melania’s “I really don’t care, do you” jacket was a jab at Ivanka in Texas. There were also rumors that Donald’s wife and eldest child are feuding.

“Melania Trump is the only person in my book who has ever successfully stood up to Ivanka Trump and won,” author Vicky Ward said.

Ward added that the two women argued over office space in the East Wing. She said that Ivanka had a “Trump family office” in the area which was “normally the territory of the First Lady.” She continued saying that when Melania learned about Ivanka’s plan she immediately put an end to it.

During the POTUS’ overseas trip, Ivanka served as one of his senior advisers. Melania did not join Donald’s campaign and opted to stay at home with their son Barron. Ivanka filled in for Melania when she was absent during Donald’s early days in the White House. Ivanka later moved into her own office in the West Wing.

Two sources told Vanity Fair that they have “observed a frostiness between the two.” They felt that Ivanka has an “intense personal will to power, but there is no doubt that stepping in for Melania has also been an obligation.”

Melania said in a previous interview that she supported her husband 100 percent but their then 9-year-old son needed a parent at home, so she stayed. As a mother, Melania prioritizes parenthood over politics.

Ivanka and Melania Trump Ivanka Trump and Melania Trump watch as President Donald Trump speaks in the Oval Office of the White House, in Washington, D.C., Feb. 28, 2017. Photo: REUTERS/Joshua Roberts