Business Insider reports Stephanie Winston Wolkoff is being sued by the Department of Justice.
The suit follows Wolkoff's publication of a tell-all about the 'rise and fall' of her 15-year friendship with first lady Melania Trump on September 1.
The DOJ claims that the publication of the book was in violation of a nondisclosure agreement she signed.
Wolkoff is a former special events planner for Vogue and helped plan President Donald Trump's inauguration in 2017.
She was fired from the White House in 2018 after a scandal involving spending on the inauguration.
Wolkoff claims that after the 2016 RNC convention, First Lady Melania Trump felt someone was trying to sabotage her.
Trump became suspicious when it was revealed parts of a speech she made had been plagiarized from a 2008 speech by Michelle Obama.