Kevin Federline accuses Britney Spears of wishing kids dead, punching son Sean Preston

Kevin Federline accuses Britney Spears of verbally mistreating their sons, Sean Preston, 20, and Jayden James, 19, on multiple occasions in his explosive new memoir.

Federline makes several allegations against Spears in “You Thought You Knew,” including that the “Toxic” singer once punched Preston in the face.

He also writes that when Preston was about 10 or 11 years old, he asked Federline why Spears kept forcing him to bathe with her.

“It was clear he was uncomfortable, to put it mildly, and I had to step in and make it stop,” Federline writes.

The former backup dancer describes in detail multiple alleged incidents of alarming behavior from Spears toward their sons, including repeatedly feeding them shellfish despite them being allergic to it, and ignoring, in general, that Jayden had serious allergies.

He claims Jayden was also hospitalized at one point when he was with Spears in Louisiana, alleging that while they told Jayden it was for allergies, he had actually gotten ahold of pills.

“Whether they were Britney’s or someone else’s, I’ll never know,” Federline writes.

He further claims Spears overly babied Jayden, keeping him in diapers well after he was potty-trained, Later, she would frequently wake him up in the middle of the night “and drag him to her room” to keep her company.

“This had gone on his whole life at that point, just one more thing that required my intervention to stop,” Federline claims. “It was a pattern: she’d pull him into her room at all hours, leaving Preston alone.

“The imbalance in her attention towards them was beyond frustrating — it was harmful,” he continues.

Federline describes one alleged incident, in which he claims Spears barged into his home unannounced when he wasn’t home. His wife, Victoria Prince, the kids and their nanny were home when, according to him, Spears somehow got through security, wearing “a corset top and Daisy Dukes so short that Vic could see everything.”

“No underwear,” he claims of Spears’ outfit at the time. “One boob hanging out of a ripped shirt. In one hand she’s got a single purple diaper. For Jayden. Who hadn’t worn a diaper in over a year.”

Federline claims Spears undressed Jayden and put him in a diaper without saying a word while Preston stayed in their movie room, before eventually leaving after being confronted by the nanny.

Federline writes that he was worried about his sons’ visits with the pop star because of her allegedly erratic behavior.

“Britney’s visits with the boys were frequent enough, but there was always something going on in her world: issues with her agent/boyfriend, Jason [Trawick], clashes with her dad, or decisions that made me question what kind of environment the boys were walking into, like the time they came home with their hair bleached,” he claims.

“Not just streaked or lightly done,” he continues to allege. “It was bleached down to their scalps.Their skin was burned. I had to shave their heads, and their scalps looked like leopard print from their chemical burns.”

Federline claims that once they were teenagers, Preston and Jayden told him they didn’t want to visit Spears anymore. He also claims they started recording incidents with the “Toxic” singer on their phones, including her allegedly screaming at Preston for not wearing a shirt she wanted him to wear for an Instagram picture.

After Federline and his sons moved to Hawaii, he writes that they hit a breaking point in their relationship with Spears. Federline claims Preston had an argument with his mother on the phone, and that Spears told her he wished they [Preston, Jayden and Federline] were all dead.

“How could a mother say that to her son?” he asks. “Preston, having dealt with her vitriol for years, took it better than I did. He understood her anger and instability, but it didn’t make it any less painful.

“Trauma like that left scars, ones I fear they’ll carry for the rest of their lives,” he continues.

Spears’ rep didn’t immediately respond to Page Six’s request for comment regarding the alleged abuse against her sons, but previously hit back at the tell-all.

“He and others are profiting off her,” the spokesperson told us Wednesday. “Sadly, it comes after child support has ended with Kevin. All she cares about are her kids … and their well-being during this sensationalism.”

Spears herself blasted the book as “white lies” on X on Wednesday night, and slammed Federline’s “constant gaslighting” as “extremely hurtful and exhausting.”

She continued to hit back at her ex-husband on X Thursday.

“Why is HE SO ANGRY … and what’s scary is he’s convincing,” she said of Federline’s recent on-camera interviews regarding the memoir. “It literally blows my mind the moments he stops before he cries are you f–king serious.”