Former Fox News personality Kimberly Guilfoyle openly discussed her sex life and displayed explicit photographs to colleagues during her time at the network, according to claims from former colleague Lisa “Kennedy” Montgomery, as reported by The New York Post.

Kennedy, now a Fox News contributor, detailed the allegations in a Daily Mail column published Thursday. She wrote that she and Guilfoyle initially connected through their “shared disdain” for California Gov. Gavin Newsom, Guilfoyle’s former husband.

That early bond faded as Kennedy became better acquainted with Guilfoyle. Kennedy wrote that she grew “less comfortable” with her former colleague as their relationship developed.

‘Kennedy’ from Fox News has revealed that back when Kimberly Guilfoyle was her colleague at Fox, Guilfoyle routinely shared X-rated photos, 'cavalierly' talked about sex, & had front & back photos of mens’ credit cards. https://t.co/7M3JNT2p2s

— Marla Hohner (@marlahohner) October 16, 2026

One episode involved a man Guilfoyle allegedly called “Lex Luthor,” according to Kennedy. Guilfoyle described the man as a “lovesick cash cow” while showing friends photographs associated with him.

Kennedy alleged that Guilfoyle displayed images of the man’s American Express black card, including both its front and back. The card images were accompanied by explicit photographs of the cardholder.

“Kimberly showed me and several of our friends pictures of his Amex black card – front and back,” Kennedy wrote. She also claimed, “There were at least three sets of these credit card-penis pairings.”

According to Kennedy, Guilfoyle’s alleged behavior inspired cryptic nicknames within the network. Those names included “Seabiscuit” and “USO,” though Kennedy’s account did not provide further details about how the names originated.

Kennedy also portrayed Guilfoyle as unusually open when discussing intimate subjects with colleagues. “In fact, Kimberly talked about sex so cavalierly that she made Samantha from Sex and the City seem like Greta Thunberg,” she wrote.

The former MTV VJ and former Fox Business host offered a sharply divided assessment of Guilfoyle’s personality.

She described Guilfoyle as “insanely charming,” but also called her a “status-chasing monster” marked by “unrelenting narcissism.”

Guilfoyle left Fox News in 2018 to work for the 2020 Trump campaign. Her departure came amid a sexual harassment probe, adding another layer to the allegations now being recounted by Kennedy.

Similar claims appeared in a 2020 report by The New Yorker. That publication reported that Guilfoyle engaged in “graphic sexual talk” and “often shared lewd images,” including “photographs of male genitalia,” during her time at Fox News.

Guilfoyle denied the workplace allegations when responding to The New Yorker. “I have never engaged in any workplace misconduct of any kind,” she told the publication at the time.

Guilfoyle and a lawyer representing the former US ambassador to Greece did not immediately respond to The Post’s request for comment regarding Kennedy’s claims. Her silence on the latest account leaves her earlier denial as her stated response to workplace misconduct allegations.

The latest claims arrived as Guilfoyle faced a separate allegation involving her personal credit card. The Wall Street Journal reported last week that she asked former GOP congressional candidate Eric Deters for $100,000 to pay her American Express card before her confirmation hearing for the ambassadorship.

Earlier this week, Guilfoyle resigned following the allegation concerning the requested payment. She denied wrongdoing in her farewell statement and pledged to defend herself against the accusations.

“These allegations are false, and I intend to vigorously defend my name, my reputation, and my integrity,” Guilfoyle wrote. She added, “I will not allow false accusations to define my decades of public service.”

Serving as the United States Ambassador to Greece has been the honor of a lifetime. I will forever be grateful to President Donald J. Trump and Secretary of State Marco Rubio for entrusting me with the extraordinary privilege of representing the greatest country in the history of the world.

From my first day as Ambassador, I have worked tirelessly to advance President Trump’s America First agenda, strengthen our strategic alliance with Greece, and deliver meaningful victories for the American people. During my tenure, we have helped secure historic agreements to expand American liquefied natural gas exports to Europe, advanced the Vertical Corridor to reduce Europe’s dependence on Russian energy, strengthened our defense and security partnership with a critical NATO ally, and expanded opportunities for American businesses and investment throughout the region. I am especially proud of the role our Embassy has played in strengthening American energy dominance, advancing economic cooperation, and ensuring that the United States remains the indispensable leader in Southeast Europe. These accomplishments are a testament to President Trump’s bold leadership, Secretary Rubio’s commitment to American diplomacy, and the extraordinary men and women who serve our country every day. I also want to address the recent allegations against me. These allegations are false, and I intend to vigorously defend my name, my reputation, and my integrity. I have dedicated my professional life to fighting for justice, standing up for what is right, and defending the values that make America exceptional. I will not allow false accusations to define my decades of public service. My gratitude and respect for President Trump and Secretary Rubio remain unwavering. I am proud of what we accomplished together, and I will always be a loyal supporter of President Trump and his mission to Make America Great Again. While my time as Ambassador may be coming to an end, my commitment to President Trump, the America First movement, and the country I love will never end. It has been the honor of my lifetime to serve the United States of America. My deepest heartfelt appreciation to the people of Greece for their hospitality, partnership, and welcoming me with open arms. God bless President Trump, God bless our incredible diplomats and service members, and God bless the United States of America. — Kimberly Guilfoyle (@kimguilfoyle) October 13, 2026

Guilfoyle also said she had dedicated her professional life to pursuing justice, standing for what is right and defending the values that make America exceptional.

Her denial addressed the allegations surrounding her departure, while Kennedy’s separate claims focused on Guilfoyle’s conduct during her years at Fox News.

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