"I like to get a little spiritual reality every now and then, and I heard about this Turkish coffee reader," said Radziwill, who invited Heather Thomson and Dorinda Medley to join her.
The trio met with a Turkish coffee reader, who made them "coffee mud," according to Medley.
The reader had each take a drink and then swirl the coffee around their cup, before reading the grounds in the bottoms and sides.
"Someone's coming back from your past," the reader told Radziwill. "For some reason, he's apologizing."
"Who is this?" asked Radziwill.
"He's like a husband who passed away," the reader told Radziwill, whose husband, Anthony, died of cancer in 1999. "Is there anyone who drives a black Jeep?"
"It was my husband's," said a stunned Radziwill, whose husband was the subject of her bestselling memoir. "The very first fight Anthony and I had was when I pulled out of our driveway and scratched his Jeep."
She continued, crying: "I've never written about it … that is the most specific info any psychic has ever given me."
The reader then told Thomson, "You're holding a child. It could be your son. An operation is coming up. Everything's going to be fine."
Thomson immediately broke down because her son, Jax, was about to undergo an operation to reconstruct both his eardrums.
"[This] is a very difficult surgery, and we're very nervous about it," she said.
The reader then told Medley she saw a balloon, information that also stunned the Housewife.
"This coffee reader is very precise," she said, referencing a balloon that seemed to come to life off the floor and float around her home right after her husband, Richard, died. "I always thought it was him saying hi."
Radziwill was set to embark on a trip to London to retrieve an urn filled with the ashes of her late husband, and she shared her personal and heartbreaking story with Medley – who hadn't returned to London since her own husband died – while in the airport.
"Anthony died three weeks after [his cousin] John F. Kennedy Jr. and [my closest friend] Carolyn Bessette died," Radziwill recalled. "The summer of '99 was not a good time for me."
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The Real Housewives of New York City airs Tuesdays (9 p.m. ET) on Bravo.