Former financier and accused depraved sex trafficker Howard Rubin is actually a loving grandfather who should be freed on a $50 million bond, his estranged wife said in new court documents.

Mary Henry wrote a letter to the court late Thursday urging the judge to spring the 70-year-old retired bond trader on the whopping bail package so that he can continue spending time with his three young grandchildren while awaiting trial.

“I understand far too well the serious charges before the court,” Henry wrote. “I can only speak from my own experience when I say they do not represent the Howie Rubin I saw: a caring father, a loving son-in-law, and devoted grandfather known affectionately as ‘Pops.'”

“He would never abandon his family. He has always placed them at the center of his life, and they remain his greatest source of strength,” she wrote to federal Judge Brian Cogan.

Rubin — once a high-flying trader at Solomon Brothers and for George Soros’ investment firm — has been locked up in a Brooklyn jail since his Sept. 26 arrest on shocking charges of sex trafficking models in a Midtown “dungeon.”

Federal prosecutors have accused Rubin of luring “dozens” of women to New York City between 2009 and 2019, where he allegedly tied them up, beat and electrocuted them.

The Brooklyn US Attorney’s Office maintains that Rubin is both a danger to the community and a flight risk, and that he should stay locked up in Sunset Park’s Metropolitan Detention Center.

His arrest came as a “‘relief” to one of his accusers, who told The Post “thank God” when told he’d been held without bail.

Henry, 74, filed for divorce from Rubin in 2021, but the pair still help take care of their grandkids and attend family events together with their three adult children, she wrote in her letter to the judge.

She has agreed to put up her Connecticut home, in which she has $1.6 million in equity, as collateral in the event that Rubin fails to show up to court, his defense attorney said in a court filing.

Rubin’s brother, Jonathan Rubin, has agreed to put his Connecticut home on the line as well, the lawyers wrote, noting the jailed financier had been taking his grandkids to weekly swimming lessons before his arrest.

“His dedication as a grandfather is also recognized throughout the community; he brings his grandchildren to swimming and dance lessons weekly, forging strong relationships with instructors and other families,” lawyer Benjamin Rosenberg wrote.

Rubin is expected to appear in Brooklyn federal court for a status conference Monday morning. A separate magistrate judge plans to hold a hearing to consider the bail proposal Monday afternoon.

Rubin’s former assistant and co-defendant Jennifer Powers, 45, has been released on a personal recognizance bond and is due in court on Monday as well.