Gennifer Flowers isn't expected to be at the presidential debate Monday night, Republican presidential nominee Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE's campaign manager said Sunday.

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"We do not expect her to be a guest of the Trump campaign," Kellyanne Conway said.

In a tweet Saturday, Trump offered to bring Flowers to the debate, in response to the attendance of billionaire Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE supporter Mark Cuban.

Flowers, who had an extramarital affair with former President Bill Clinton William (Bill) Jefferson ClintonGOP brushes back charges of hypocrisy in Supreme Court fight Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE while he was governor of Arkansas, later responded on Twitter saying she would "definitely" be at the debate.

Conway said that Trump's tweet was just an effort to put Hillary Clinton, the Democratic presidential nominee, "on notice" for inviting Cuban and trying to get into his head.

"Mr. Trump was putting them on notice that we could certainly invite guests that make it into the head of Hillary Clinton," Conway said.

— This report was updated at 9:31 a.m.