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.