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Truth about Warren Buffett's 'unconventional' marriage: The open secret about his 'closest advisor' and his wife's stunning letter to another woman revealed

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Spitznagel, E. (2026, September 21). Truth about Warren Buffett's 'unconventional' marriage: The open secret about his 'closest advisor' and his wife's stunning letter to another woman revealed. Daily Mail. https://www.dailymail.com/news/article-16143277/warren-buffett-marriage-women.html?ns_mchannel=rss&ns_campaign=1490&ito=1490

Dated when The Aporia collected the article, usually within hours of publication. Check the original for its exact date and byline.

Daily Mail · collected 2026-09-21 · by Eric Spitznagel

Quick Summary

The article discusses the complex personal life of billionaire investor Warren Buffett, revealing details about his relationship with Astrid Menks and an alleged affair with Katharine Graham, former publisher of The Washington Post. It mentions that while Buffett remained married to Susan Buffett for over 61 years until her death in 2023, he had a long-standing relationship with Menks who lived with them since the 1970s. Additionally, the article cites journalist Alice Schroeder's biography "The Snowball" which suggests that Buffett had an affair with Graham during his investment in The Washington Post, leading to tension within his marriage.
Written by AI on 2026-09-21, from this article's own text only (the story summary below draws on all the coverage).

AI analysis

Story summary

Warren Buffett, known as "The Oracle of Omaha," recently stepped down as chairman of Berkshire Hathaway, handing over to his son Howard at age 96. Over six decades, Buffett transformed Berkshire from a struggling textile firm into an investment giant worth nearly $1 trillion by adhering to principles of simplicity and patience in investing. However, behind the scenes, Buffett's personal life was complex: He married Susan Thompson Buffett in 1952 but later became close to Astrid Menks, who moved into his home while he was still married to Susan. The details about his unconventional relationships were revealed in a letter Susan wrote to another woman, shedding light on the dynamics within the family over the years.

Written for “Warren Buffet Marriage Secrets” on 2026-11-02, grounded in this article and the 0 other(s) covering the same event.

Story

📰 Warren Buffet Marriage Secrets
Entertainment · 1 article(s) covering the same event.

Compared with similar articles

This article reads unscored and hedges 10% of its claims. Each row says how that neighbour differs.
ABC News (US)
Hedges 0 of 10 claims Outlet record 70/100
“While both articles mention Warren Buffett stepping down as chairman of Berkshire Hathaway, they cover different aspects and details related to this transition.”
ABC News (US)
Hedges 0 of 5 claims Outlet record 70/100
“Article A focuses on Warren Buffett stepping down as chairman of Berkshire Hathaway and the transition to his son Howard Buffett. Article B discusses a personal aspect of Warren Buffett's life, specifically regarding his marriage and relationships.”
Washington Examiner
Hedges 2 of 21 claims Outlet record 70/100
“Article A covers Warren Buffett stepping down as chairman of Berkshire Hathaway, while Article B discusses personal details about his unconventional marriage and mentions his resignation in passing.”
NPR
Hedges 0 of 10 claims Outlet record 60/100
“Article A reports on Warren Buffett stepping down as chairman of Berkshire Hathaway and his son Howard taking over the role. Article B discusses a personal aspect of Warren Buffett's life related to his marriage, though it mentions his stepping down in passing.”
Al Jazeera
Hedges 2 of 28 claims Outlet record 60/100
“Article A reports on Warren Buffett stepping down as chairman of Berkshire Hathaway and becoming chairman emeritus. Article B discusses personal details about Warren Buffett's unconventional marriage but mentions his stepping down from the chairmanship in passing, not focusing on it as a specific event.”
BBC News
Hedges 1 of 15 claims Outlet record 68/100
“Article A covers Warren Buffett stepping down as chairman of Berkshire Hathaway and the leadership transition, while Article B focuses on personal details about his unconventional marriage and mentions his resignation but does not describe it as the same specific event.”
The Sydney Morning Herald
Hedges 7 of 41 claims Outlet record 61/100
“The articles discuss different aspects of Warren Buffett's transition at Berkshire Hathaway, but do not describe the exact same specific occurrence.”
New York Post
Hedges 0 of 8 claims Outlet record 66/100
“The articles describe different aspects of Warren Buffett's career and personal life; one focuses on his stepping down as chairman of Berkshire Hathaway, while the other discusses an unconventional aspect of his marriage.”
The Hindu
Hedges 1 of 15 claims Outlet record 60/100
“Article A covers Warren Buffett stepping down as Berkshire Hathaway chairman on September 19, 2026. Article B mentions this but focuses more on personal details of Buffett's marriage and long-term relationship.”
NBC News
Outlet record 60/100
“Article A focuses on Warren Buffett stepping down as chairman of Berkshire Hathaway, while Article B discusses personal details about Buffett's marriage and briefly mentions his resignation.”
How this article was measured signals, leaning charts, publisher record, byline, topics and claims

Signals How these are calculated →

Claims extracted
61
sentences that state something as happening or true
Uncertain
10%
6 of 61 hedged ("reportedly", "may", "according to")
Leaning
not political
takes no side on a contested political question
Publisher signals
69/100
Daily Mail's corrections and hedging, across everything collected from it. Not a measure of accuracy.
Outlets on this story
1
Entertainment
Same framing elsewhere
1
articles that frame the event the way this one does
Analyzed 2026-09-21 · how these are computed

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Publisher

Daily Mail · 8805 article(s) · 22 correction(s) detected
Running correction rate · 22 correction(s)

Who wrote this

Eric Spitznagel
5 article(s) here · 1 carrying a prediction
🔮 Across Japan, the audit identified 234,354 people still on family registers whose whereabouts couldn’t be confirmed.
🔮 He applied that same thinking to his own life, setting up systems to manage his life using savvy and behavioral science — not sheer will power — to meet deadlines, get in workouts, stick to a budget and the like.
🔮 Over 61 years, Buffett transformed the struggling textile maker into a $1 trillion investment giant by following a set of staid principles that projected simplicity, patience and self-control.
🔮 If the Revolutionary Guards overheard them, “they would both be arrested, interrogated, imprisoned, and possibly executed, once the torture was completed,” writes British journalist Ben Macintyre in his new book, “Redwood: The Untold Story of the Cold War’s Most Extraordinary Spy” (Crown), out now.
🔮 “I began to think that maybe I had no business buying the team in the first place,” he writes.
Also by Eric Spitznagel
Nothing else under this byline is closely related to this article, so these are simply their most recent.

Topics

Berkshire Hathaway THE DAILY MAIL The Washington Post Company Washington the Oracle of Omaha

Subjects

Buffett PERSON · 11× Graham PERSON · 7× Schroeder PERSON · 7× Susan PERSON · 4× Warren PERSON · 4× Warren Buffett PERSON · 4× Susie PERSON · 2× THE DAILY MAIL ORG · 2× Warren Buffett's PERSON · 2× the Oracle of Omaha ORG · 2×

Narrative

Warren Buffett and Astrid Buffett arrive for a State Dinner in honor of British Prime Minister David Cameron at the White House on March 14, 2012 For years, many of Warren Buffett's friends received a Christmas card from the Oracle of Omaha signed by three people: 'Warren, Susie, and Astrid' He also had difficulty taking care of himself, and Susan knew it.
framing: assertive · carried by 1 article(s) · first seen 2026-09-21
🔮 Over 61 years, Buffett transformed the struggling textile maker into a $1 trillion investment giant by following a set of staid principles that projected simplicity, patience and self-control.

Claims (61 extracted, 6 hedged)

For years, many of Warren Buffett's friends received a Christmas card from the Oracle of Omaha signed by three people: 'Warren, Susie, and Astrid.' asserted
many → receive → people
The signatures belonged to Buffett, his wife Susan, and Astrid Menks, who moved into their home while the Buffetts were still married. asserted
Buffetts → belong → home
On Friday, Buffett, 96, stepped down as chairman of Berkshire Hathaway, passing the top job to his son Howard. asserted
Buffett → step → son
'Father Time always wins,' he told shareholders. asserted
he → win → shareholders
Over 61 years, Buffett transformed the struggling textile maker into a $1 trillion investment giant by following a set of staid principles that projected simplicity, patience and self-control. asserted
that → transform → simplicity
Buffett married Susan Thompson Buffett in 1952. asserted
Buffett → marry → 1952
Daughter Susan Alice was born in 1953; Howard and Peter followed in '54 and '58. asserted
Howard → bear → 58
Then things took a turn in 1973, when Buffett first started buying shares in The Washington Post Company. asserted
Buffett → take → Company
Buffett, then 46, grew close to its steel-spined publisher, Katharine Graham, a widow 13 years his senior. asserted
Buffett → grow → publisher
Alice Schroeder's 2008 biography, The Snowball: Warren Buffett and the Business of Life, describes the relationship as an affair. asserted
biography → describe → affair
Warren Buffett and wife Susan Buffett arrive for the State Dinner for British Prime Minister Tony Blair May 2, 1998 Warren Buffett and Katharine Graham, who he grew close to at The Washington Post uncertain
he → arrive → Post
Buffett personally chose Schroeder to write his life story. asserted
Buffett → choose → story
He gave her thousands of hours of interviews and access to his files, family and associates. asserted
He → give → files
He even told her to use the less flattering version when accounts conflicted. asserted
accounts → tell → version
A spokeswoman for the publisher later said Buffett reviewed the book but changed nothing. asserted
Buffett → say → nothing
After the book was published, however, Schroeder said their relationship cooled. asserted
relationship → publish → ?
According to Schroeder, Buffett kept clothes at Graham's Washington home and spent time with her at Martha's Vineyard. uncertain
Buffett → accord → Vineyard
She tried to improve his wardrobe by taking him to meet the fashion designer Halston. asserted
She → try → designer
They didn't appear to exactly keep the nature of their relationship a secret, either. asserted
They → appear → relationship
At charity events, Graham would reportedly toss him her house key. uncertain
Graham → toss → key
Carol Felsenthal, journalist and author of the unauthorized Graham biography Power, Privilege and the Post, separately heard from members of Graham's Washington circle who believed the relationship was sexual. asserted
relationship → hear → circle
'He became her closest advisor, and she completely relied on him,' Felsenthal tells the Daily Mail. asserted
Felsenthal → become → Mail
'Whatever Warren said was gospel.' asserted
said → say → Whatever
Felsenthal says at least two people she interviewed believed Buffett and Graham were lovers. asserted
Buffett → say → ?
But she draws a firm line between what her sources believed and what she can prove. asserted
she → draw → what
'Whether she and Warren Buffett cuddled and had sex, I have no idea,' she says. Whatever happened physically, the closeness had consequences at home. asserted
closeness → cuddle → home
Schroeder writes that Susan Buffett was furious and humiliated by the attention they attracted, later sending Graham a letter effectively granting her permission to pursue a relationship with her husband. asserted
they → write → husband
Graham, according to Schroeder, showed the letter to friends as though it cleared her. uncertain
it → accord → her
Susan was also pursuing a life outside the marriage. asserted
Susan → pursue → marriage
Schroeder reports that she had begun a romance with her tennis coach, John McCabe. asserted
she → report → coach
In 1977, Susan moved into a small apartment in San Francisco, with McCabe taking another apartment nearby. asserted
McCabe → move → apartment
But she and Buffett did not divorce. asserted
she → divorce → ?
Instead, their marriage stretched into something difficult to categorize. asserted
marriage → stretch → something
Susan wanted a life of her own but remained deeply tied to her husband. asserted
Susan → want → husband
Warren was devastated by her departure and, according to Schroeder, called her every day, sometimes weeping. uncertain
Warren → devastate → her
Warren Buffett and Astrid Buffett arrive for a State Dinner in honor of British Prime Minister David Cameron at the White House on March 14, 2012 For years, many of Warren Buffett's friends received a Christmas card from the Oracle of Omaha signed by three people: 'Warren, Susie, and Astrid' He also had difficulty taking care of himself, and Susan knew it. asserted
Susan → arrive → it
Before settling in San Francisco, she asked her friend Astrid Menks, who worked at the French Café in Omaha where Susan sang, to check on him. asserted
Susan → settle → him
'I called Astrid,' Susan later recalled. asserted
Susan → call → Astrid
'I said, Astrid, will you take Warren, make him some soup, go over there and look after him?' asserted
you → say → him
Astrid did. asserted
Astrid → do → ?
…and 21 more, not listed.
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