President Donald Trump, 72, and first lady Melania Trump, 48, have been married since 2005, and there has been much speculation about their relationship — everything from tabloid-style claims that Melania Trump is extremely unhappy to reports that she “trolls” the president online.

Now, veteran journalist Bob Woodward’s newly released book, “Fear: Trump in the White House,” claims to have insight into the marriage and the relationship, as multiple outlets including the Daily Express have reported.

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On page 174 of his book, Woodward writes: “West Wingers and those who traveled regularly with Trump noticed that he and Melania seemed to have some sincere affection for each other despite media speculation.”

He added, “They ate dinner together at times, spent some time together but they never really seemed to merge their lives.”

He also wrote, “Melania’s primary concern was their son, Barron.”

The Trump couple has been together for 13 years.

They have a 12-year-old son, Barron.

The pair met in New York City at a Fashion Week party when Melania was working as a model. The business mogul and the high-fashion model hit it off; the pair have been together since.

President Trump is currently fighting a legal battle involving his alleged affair with porn star Stormy Daniels, which has caused people to speculate about the couple’s relationship.

Protesters even went so far as to hold “Free Melania” signs during the Women’s March in January 2017, as People reported; President Trump has denied all of the allegations against him, including the rumors about affairs.

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Related: Stormy Daniels Gets ‘Key to City’ for Her ‘Leadership’ Against Trump

Melania Trump and her husband put on a united front for their touching September 11 tributes — but the first lady was slammed by some for her post remembering those who were lost and affected by that horrible day.

The president’s wife shared a somber picture of herself and POTUS standing with two military guards on each side; it was taken outside the White House.

Both the guards and the president held up their hands in salute form.

“A somber tribute at Flight 93 National Memorial this morning,” Melania Trump wrote.

“We honor the many lost at the hands of evil on 9/11. It’s a time to remember the strength of this nation & the power that comes from unity, leadership & courage. God bless this great nation.”

Some people found her comments and posting distasteful and “narcissistic,” as Inquisitr reported.

Many believed it would have been more appropriate for her to post a patriotic image — such as the picture of the twin towers her stepson Donald Trump Jr. posted on his Instagram page — instead of a shot of herself and POTUS.

Related: 10 Salacious Allegations Bob Woodward Makes About Trump in His New Book

“To commemorate 9/11 you post an image of … yourselves. Ok,” wrote one person.

“Never forget what an embarrassment the man beside you is,” said another.