Fergie is on record for lavishly praising Epstein as a “wonderful” man. and having her daughters meet him. This was after he had been convicted for various crimes.
Epstein might have also lent Fergie a large amount of money at one time. So both she and her ex the former Prince were enamored with the high class life style found on Epstein’s secluded islands.
I’d be curious whether Markle has any connections to them prior to meeting Harry.