Kelly Bensimon found out the man she’s been dating was locking lips with someone else just an hour before she walked the runway in a bikini for Miami Swim Week.

A source tells us that the former “Real Housewives of New York” star was backstage at designer Melissa Odabash’s show, “sitting in hair and makeup and she got a text,” that the man she has been dating, financier Robert Flood, was allegedly locking lips with his former fiancée at a bar in Westchester, NY.

A spy tells us that, “people were saying to her, ‘Don’t let this psych you out,’” before she strutted the catwalk in a two-piece suit to open the show last weekend.

We hear that Bensimon confronted Flood — who also briefly dated Tiger Wood’s former mistress Rachel Uchitel — a few days later,and is now trying to figure out what to do.

“She really likes him,” said a source. “It’s early, but that’s the last thing you want to know.”

We hear the reality star-turned-power real estate broker “is sad and trying to find a way to forgive him. But she’s also 57 and doesn’t want to waste her time. She doesn’t know what to do.”

Bensimon was photographed looking cozy with the Greenwich, Conn., financier outside Beefbar in Tribeca last month.

We have attempted to reach out to Flood for comment.

It was the first time the power broker was seen on a romantic outing since calling off her wedding to Scott Litner.  She also has a new iHeart podcast, “I Do, Part 2.”

Dr. Khan has become the “it” doctor for New York’s social set, the Post previously reported, counting actress Jenny Mollen and reality star-turned-wellness whiz Lo Bosworth as clients.

Bensimon has been on the trendy NAD+ treatment, which purports to give cells energy.

“It’s a coenzyme that keeps the powerhouse of your cells working optimally,” Dr. Khan told us. “It’s creating the energy your cells need.” 

Bensimon also took glutathione, an antioxidant produced naturally by the body that drops with age.

“A lot of longevity medicine is replacing molecules you have lost by 40 or 50 to give you energy you had as a young person,” Khan told us. “That also reflects in your ability to exercise and recover from exercise.” 

Bensimon told Page Six, “It’s transformative. It changed my body.”

She listed off a slew of benefits she credits to the peptides she started taking in March.

“You feel healthier. Your skin texture changes, your hair and nail growth changes,” Bensimon told us. “It changed my entire body. I had bad gut health…  I have noticed a massive massive change.”

She also tells us, “My skin texture looks totally different. Tighter, brighter. People are like, wow you look so youthful.”

 The cost is $1,500 a month or $800 for a single visit to Dr. Khan.

Bensimon also says she ate “tons of protein and veggies,” and worked out with Equinox trainer João Martins.

Attorneys for Sean “Diddy” Combs have moved for a mistrial in his sex trafficking case — their second such request within two weeks.

The 55-year-old music mogul’s defense team made the latest request after claiming “prosecutorial misconduct” in a June 7 letter to Judge Arun Subramanian.

The defense claimed in the letter, obtained by PEOPLE, that “the government has presented testimony that it knew or should have known was materially false related to its allegation that Mr. Combs dangled Bryana Bongolan from the balcony of Cassie Ventura’s apartment in September 2016.”

“Accordingly, to avoid an unfair conviction in this case the Court should grant a mistrial,” the defense team continued.

Combs’ legal team then claimed that testimony from Ventura, 38 —  in which she stated that she saw Combs dangle Bongolan from a balcony — could not have been true, as text records allegedly show that Ventura learned of the alleged incident after the fact.

“The incident, as alleged, is disturbing and powerful evidence, and the government has used it to depict Mr. Combs in an extremely negative light, as an angry and dangerous man who terrified Ms. Ventura and her friends,” the defense team continued, while also stating that Ventura’s account of the incident is “demonstrably false.”

The defense team also claimed that the prosecution then presented photos of the injuries sustained by Bongolan as a result of the balcony incident that were allegedly taken on Sept. 26, 2016, in Los Angeles. 

The defense stated that the prosecution knew “or should have known that this testimony was perjured,” as “the government has long known” that Combs was in New York City between Sept. 24 to Sept. 29 of that year. 

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The defense team further claimed that the prosecution “repeatedly attempted to disrupt” the defense’s line of questioning when the defense attempted to “expose the perjury upon cross-examination.”

“All of this was highly improper and exacerbated the harm caused by […] the perjured testimony,” Combs’ legal team stated, before adding that “the balcony incident is just one example of prosecutorial misconduct during this trial.”

The first move for a mistrial from Combs’ legal team occurred at the end of May, after prosecutors asked Los Angeles Fire Department arson investigator Lance Jimenez if fingerprint evidence related to the bombing of Kid Cudi’s car had been destroyed. Prosecutors also asked about who might have authorized the destruction.

Combs’ lawyers argued that the line of questioning could potentially imply the idea that Combs could buy his way out of trouble.

“They were trying to plant this idea to the these jurors that Mr. Combs authorized this,” defense attorney Alexandra Shapiro said at the time.

Judge Subramanian denied the defense’s first motion, ruling that the questions were not prejudicial.

You can’t best the champ.

Simone Biles slammed conservative activist and former swimmer Riley Gaines on X, calling her a “straight up sore loser” after Gaines criticized trans athletes.

“You’re truly sick, all of this campaigning because you lost a race,” Biles wrote on Friday.

“You should be uplifting the trans community and perhaps finding a way to make sports inclusive OR creating a new avenue where trans feel safe in sports. Maybe a transgender category IN ALL sports!!,” she continued.

“But instead… You bully them… One thing’s for sure is no one in sports is safe with you around!!!!!” Biles, 28, closed, before tagging Gaines in a follow-up post, telling the ex-swimmer to “bully someone your own size, which would ironically be a male.”

The Olympic gold winner’s remarks come after Gaines commented on a post from the Minnesota State High School League, celebrating the school’s first ever Softball State Championship win.

“Comments off lol. To be expected when your star player is a boy,” Gaines, 25, wrote, making a reference to Marissa Rothenberger, a transgender pitcher on the team, per Fox News.

The activist didn’t take too kindly to Biles’ comments as she responded and expressed that she felt the gymnast’s take was “so disappointing.”

“It’s not my job or the job of any woman to figure out how to include men in our spaces. You can uplift men stealing championships in women’s sports with YOUR platform,” Gaines shot back on X.

“Men don’t belong in women’s sports and I say that with my full chest.”

Gaines continued, adding that her opinion on the issue is the “least controversial take on the planet.”

“Simone Biles being a male-apologist at the expense of young girls’ dreams? Didn’t have that on my bingo card. Maybe she could compete in pommel horse and rings in 2028,” she added.

“And the subtle hint at ‘body-shaming’ ???? Plzzzz I’m 5’5,” Gaines also said in response to the personal attack.