MSNBC "Morning Joe" co-host Mika Brzezinski on Thursday confronted Michael Wolff, author of the sensational Fire and Fury: Inside the Trump White House, over his repeated suggestions that the president is having an affair with U.S. Ambassador to the United Nations Nikki Haley.

Wolff was on Thursday's edition of the show initially to discuss his reporting for the book as it related to the Justice Department's investigation into whether the Trump campaign colluded with Russia in 2016. But then the subject turned to the affair rumor.

"Do you regret inferring anything about Nikki Haley?" Brzezinski asked.

Wolff claimed that he "didn’t infer anything about Nikki Haley" but said, "many of the people around the president believe that he is involved with various women.”

He said the portion of his book about Haley, which he had previously suggested was related to an affair, was rather about her ambitions to become secretary of the State Department and that "everywhere in the White House they were suddenly in quite a panic that this was actually happening."

"I’m gonna go as far as to say that you might be having a fun time, playing a little game dancing around this," Brzezinski said, "but you're slurring a woman. It’s disgraceful"

Wolff maintained that Haley had not been directly accused of anything, though he had previously said he was certain Trump was having an affair and pointed readers to "read between the lines" of his book to figure it out.

He had also said in a separate interview this week that Haley "embraced" the rumor.

Haley has denied the accusation.

"She has decided to deny what she has not been accused of," Wolff said. "Certainly, I didn’t accuse her of this." He told Brzezinski to "read me the language" from the book.

Brzezinski grew frustrated and ended the interview.

"I’m not reading you anything," she said. "If you don’t get it and you don’t get what we’re talking about — I’m sorry, this is awkward here on the set with us, but we’re done."

Fire and Fury has sold more than a million copies worldwide and shook that White House after the book ignited speculation over Trump's mental health.