Lawyers for Jeffrey Epstein’s victims are demanding details of contact between him and Prince Andrew at royal homes.
There are fears the information could incriminate the Prince.
But a friend of Andrew, 60, branded the move a “cynical attempt by US law firms to keep their case in the public eye”.
In court papers, victims are seeking documents detailing “all texts or emails” and “calls in and calls out” between the two friends.
Since 2000, Epstein had attended parties at Windsor Castle and Sandringham.
The papers also demand to know if the Prince “engaged in any sexual act while at any of Jeffrey Epstein’s property”.
The new demands on the pervert’s estate were made on behalf of an alleged victim known only as “Priscilla Doe”.
She claims Epstein coerced her into performing sex acts for his rich pals after he had offered the then 20-year-old help with her dancing career.
The papers want “telephone data information” and “text or email usage” between the paedophile, who hanged himself in August, and Andrew.
It covers the time the Prince is accused of sleeping with Epstein’s then-teenage “sex slave” Virginia Giuffre.
Andrew categorically denies that claim.
A spokesman for Andrew declined to comment.