HUNTER ’FESS IN MEMOIR

Wife found ‘sicko’ texts

Hunter Biden’s forthcoming memoir reveals that text messages on an iPad tipped off his wife to his affair with his late brother Beau’s widow, according to a report Tuesday.

In “Beautiful Things,” President Biden’s son says that Kathleen Biden — with whom he has three grown daughters — finally decided to divorce him when she found the device and learned about his relationship with sister-in-law Hallie Biden, a publishing insider told The Sun.

“The book admits that this was the final straw for Kathleen,” the source said. “She’d tried for years to help him beat his addiction to crack cocaine and booze. But then she found out he was sleeping with his brother’s wife. She said he was a sicko.”

In March 2017, Page Six exclusively revealed that Hunter (inset) and Hallie were having an affair and that Hunter and Kathleen had separated.

The stunning turn of events came less than two years after Hunter’s older brother, former Delaware Attorney General Beau Biden, died of brain cancer.

Their dad didn’t know about the affair until Page Six reached out for comment — and Hunter begged him to issue a statement giving his blessing, Hunter told The New Yorker in 2019.

“We are all lucky that Hunter and Hallie found each other as they were putting their lives together again after such sadness,” Joe Biden said at the time. “They have mine and [my wife] Jill’s full and complete support and we are happy for them.”

In Hunter’s 272-page memoir, set for release April 6, he wrote that his affair with his brother’s widow began “as mutually desperate grasping for love we both had lost, and its dissolution only deepened that tragedy,” according to The Guardian, which said it had obtained a copy.

The book downplays the controversy over Hunter’s lucrative appointment to a seat on the board of the Ukrainian energy company Burisma Holdings.

While Hunter reportedly acknowledges that his last name was “gold” to the company, which paid him as much as $50,000 a month, he claims the position was more about Russia than about his then-vicepresident father.

“To put it more bluntly, having a Biden on Burisma’s board was a loud and unmistakable f--k you to [Russian President Vladimir] Putin,” The Guardian quotes him as saying.

Hunter also reportedly details how he went on a five-month sex-anddrugs binge in Los Angeles after his marriage fell apart.

The epic debauchery reportedly began at the Chateau Marmont in Hollywood, where comedian John Belushi fatally overdosed on a heroin-and-cocaine “speedball” in 1982.

“Hunter holed up in a bungalow there and learned how to cook crack,” the source told The Sun. “He hung out with strippers, con artists and junkies who followed him as he moved between Chateau and sordid Airbnbs.”

The book reportedly describes how Hunter “was smoking crack and his visitors came with their own drugs, including heroin and meth.”

“He lost count of the charges they racked up on his credit cards. He calls it ‘nonstop depravity,’ ” the source added.

Kathleen filed for divorce on Dec. 6, 2016, later alleging in court papers that during a separation that began several months after Beau died in May 2015, Hunter “created financial concerns for the family by spending extravagantly on his own interests (including drugs, alcohol, prostitutes, strip clubs, and gifts for women with whom he has sexual relations).”

Since then, Hunter has settled a paternity case filed by a former Washington, DC, stripper who gave birth to their daughter in August 2018.