Former president Joe Biden's son Hunter reacted strongly to a legal threat from First Lady Melania Trump, publishing an expletive-laden video on YouTube in response to her demand for an apology and retraction.

Hunter made the false claim that Melania Trump was introduced to President Donald Trump by convicted sex offender and pedophile Jeffrey Epstein, citing a Daily Beast report sourced to author Michael Wolff.

The Daily Beast report was retracted with an apology, but Hunter still repeated the claim in an interview with the Channel 5 with Andrew Callaghan podcast.

'They knew each other well, they spent an enormous amount of time together,' the former president's son said of Donald Trump and Epstein. 'According to his biographer, Jeffrey Epstein introduced Melania, that's how Melania .. the first lady and the president met.'

Mrs. Trump's lawyer threatened to sue Hunter Biden for $1 billion unless they 'immediately retract the false, defamatory, disparaging and inflammatory statements made about Mrs. Trump.'