Kevin Federline is set to release his upcoming memoir, titled “You Thought You Knew,” in which he publicly voices significant concerns regarding the mental health and parenting capabilities of his ex-wife, pop superstar Britney Spears. Excerpts from the book, shared by The New York Times on Tuesday, October 14, reveal Federline’s profound fears about Spears’ well-being and lead him to question whether the termination of her conservatorship in 2021 was a sound decision.

Federline articulates a sense of urgency and impending crisis within the pages of his memoir, stating, “The truth is, this situation with Britney feels like it’s racing toward something irreversible.” He continues, “It’s become impossible to pretend everything’s OK,” and warns that “the clock is ticking, and we’re getting close to the 11th hour. Something bad is going to happen if things don’t change, and my biggest fear is that our sons will be left holding the pieces.”

Spears and Federline were married in 2004 and finalized their divorce in 2007. They are parents to two sons, Sean, aged 20, and Jayden, aged 19. Further into “You Thought You Knew,” Federline recounts unsettling alleged past behaviors from his former partner towards their children. He writes, “They would awaken sometimes at night to find her standing silently in the doorway, watching them sleep — ‘Oh, you’re awake?’ — with a knife in her hand. Then she’d turn around and pad off without explanation.”

However, a representative for Britney Spears swiftly dismissed Federline’s allegations in a statement to Billboard. The spokesperson commented, “With news from Kevin’s book breaking, once again he and others are profiting off [Britney].” The statement also highlighted the timing, noting, “Sadly it comes after child support has ended with Kevin. All she cares about are her kids, Sean Preston and Jayden James and their well-being during this sensationalism. She detailed her journey in her memoir [The Woman in Me].”

Federline’s memoir is scheduled for release on October 21. Leading up to this, he is slated to give his sole televised interview about the project on Entertainment Tonight. In a preview for the conversation, Federline explained his motivation, stating he feels compelled to “sound the alarm” on what he perceives as his ex-wife’s ongoing mental health challenges. In his memoir, he also asserts his intentions were pure, adding, “I’ve never, ever, once, been against Britney. I’ve only tried to help my sons have an incredible relationship with their mother. And it’s hard because when I really reflect on everything that’s happened — my kids do not know the woman that I married. And I’ve spent two decades trying to bridge that gap.”

These dramatic claims emerge as Spears herself has been transparent about her efforts to rebuild and strengthen her relationship with her sons. Following her split from Federline, the boys were placed in their father’s custody, and in 2023, they relocated with him to Hawaii. Despite the distance and past challenges, Spears joyfully shared on Christmas 2024 via Instagram that she had spent quality time with Jayden after a two-year separation, exclaiming, “Best Christmas of my life !!! I haven’t seen my boys in 2 years !!! Tears of joy and literally in shock everyday koo koo crazy so in love and blessed !!! I’m speechless thank you Jesus !!!” She has subsequently shared additional photos with Jayden throughout the past year.