Kevin Federline is making some major accusations against ex-wife Britney Spears .

If you forgot, the 47-year-old former back-up dancer and the 43-year-old “Circus” singer married in 2004 before finalizing their divorce in 2007. They share sons Sean Preston , 20, and Jayden James , 19.

In his forthcoming memoir You Thought You Knew , Kevin claimed that when Britney was pregnant, she was drinking and on medication.

“That mix was… dangerous. F–ked up, honestly,” Kevin wrote, per People . “You’re not supposed to drink when you’re on meds like that. A couple of glasses of wine for her would hit like a whole bottle because of the medication.”

Kevin went on to claim that he tried to make excuses for Britney , acknowledging just how difficult and how much pressure

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