The feud between power-lawyer David Boies and Harvard Law professor Alan Dershowitz took a bizarre turn Thursday night when Dershowitz appeared on Laura Ingraham's Fox News show to defend himself from allegations that he slept with one of former client Jeffrey Epstein's alleged underage sex slaves.

Boies is representing Virginia Roberts Giuffre, the former Mar-a-Lago locker room attendant who claims that she was recruited by Epstein's former madame and ex-girlfriend Ghislaine Maxwell when she was 16, and then groomed for sex slavery. Giuffre and another Epstein accuser, Sarah Ransome, claim that Dershowitz was among the powerful men that Epstein forced them to have sex with.

During the interview with Ingraham, Dershowitz claimed that he has had sex with only one woman since the day he met Jeffrey Epstein, and that he and his wife have a "perfect sex life." He then challenged Boies to say the same under oath.

"I have had sex with one woman since the day I met Jeffrey Epstein. I challenge David Boies to say under oath that he's only had sex with one woman...he has an enormous amount of chutzpah to attack me and challenge my perfect, perfect sex life during the relevant period of time," Dershowitz said.

Later, Dershowitz accused Boies of having a "terrible reputation for sexual activities" and insisted that the rival lawyer was only representing Epstein's accusers for the money, despite Boies' claims that he's taking on the cases pro-bono. Dershowitz claimed that he has emails from one accuser in which "she admits that she didn't have sex with me" and that "she put me in her book to help sell the book." Meanwhile, his other accuser claims she has sex tapes of powerful figures including the Clintons, President Trump and Richard Branson, Dershowitz said.

Dershowtiz then claimed that the women only started "telling their lies" after meeting with Boies.

"These are the most tainted serial liars imaginable and they all started telling their lies after they met David Boies," Dershowitz said. He then called for a federal investigation into Boies and insisted that he would be happy for the Feds to investigate him as well because "I am afraid of nothing and I have nothing to hide."

Dershowitz, who is famous for his work on OJ Simpson's legal "Dream Team" and for defending President Trump during the Mueller investigation, represented Epstein during the convicted pedophile's 2008 sweetheart plea agreement. Epstein was denied bail on Thursday, meaning that he will remain in his tiny jail cell instead of being allowed to return to his Manhattan mansion.