Britney Spears’s former husband Kevin Federline made several claims against the pop singer through his memoir “You Thought You Knew,” including allegations of her cheating on him with a woman as well as the apparent concerning behavior she has exhibited toward their sons. In an excerpt from the book—set to launch on Oct. 21—released by foreign media outlets, Federline narrated how he allegedly caught Spears “making out” with one of her female staffers during a concert tour in Europe. Federline said he decided to leave and fly back to the United States because of what he witnessed, but that Spears […]... Keep on reading: Britney Spears accused by ex-husband Kevin Federline of cheating with woman