Maxwell snapped the author portrait for Radziwill's 2007 memoir What Remains, a fact that has reemerged amid scrutiny of Epstein's behavior.

An insider added: "From the family's perspective, that crossed a line they couldn't overlook."

Another source said: "The feeling is that Carole keeps revisiting the Kennedy story, while the family is trying to protect it. They're finished."

Radziwill joined The Real Housewives of New York City in 2012 and quickly became a fan favorite for her laid-back personality.

The journalist and author spent six seasons on the Bravo reality series before leaving the show in 2018.