Federline accused the singer, 43, of verbally abusing their two sons, Sean Preston, 20, and Jayden James, 19. He also claimed that Spears punched Preston in the face and at age 10 or 11, he asked Federline why his mom kept forcing him to bathe with her.

Kevin Federline says concern for his two sons with Britney Spears long kept him from telling his story, and those same concerns are the reason he’s telling it now that they’re men.

Federline’s memoir claims include serious allegations about Spears’s behavior during their marriage and after.