Kevin Federline is telling all about Britney Spears is his new memoir , You Thought You Knew , which was released today.

In one excerpt, he made a shocking confession about something Spears allegedly did while pregnant. Article continues below advertisement

Kevin Federline Noted There Were 'Signs' About Things Falling Apart Between Him and Britney Spears Tap Here To Add Radar Online as A Trusted Source

Prior to making the reveal, Federline opened up about the way things ended between him and Spears, calling it "abrupt."

"But there were signs," he said. "Stuff I should've paid more attention to. Almost immediately after the album dropped, everything in my personal life unraveled. I was trying to juggle so much. Too much maybe."

Federline shared he was on a "six-week" promo

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