Kevin Federline has held off writing about Britney Spears. Until now

Kevin Federline, Britney Spears' ex-husband, has exposed details of their tumultuous relationship in his upcoming memoir, "You Thought You Knew." Federline accuses Spears of concerning behavior, including substance abuse and erratic actions towards their children. The revelations have sparked a public feud, with Spears denouncing Federline's book as hurtful and profit-driven. The former couple's history of custody battles and Spears' mental health struggles are highlighted, shedding light on their troubled past.