Kevin Beefs Up Security, Feels Britney Is "Clearly Deranged"!

Kevin Federline's been the picture of spousal concern throughout Britney Spears' ordeal - but apparently, all that ends today!

OK! Magazine is reporting that the aspiring rapper "freaked out" after Britney's early release Saturday morning, and has "doubled" his security at his Tarzana mansion!

"The boys are safe for now," the source reveals to the magazine. "But Kevin feels
Britney is clearly deranged, and theres no telling what shell do. After all,
this is a woman who two days ago barricaded herself in her bedroom with her
youngest child for three hours!"

X17 caught bodyguards arriving at Federline's house early Saturday morning - even before her visit with Dr. Phil which precipitated her early release.

Apparently, Federline is particularly fearful of a repeat of Britney's attempt last February to "wrestle her way inside" his house to get her sons, the source says - the attempt which immediately preceded her infamous umbrella incident.

"When Kevin refused each time, she took out her frustration on a
photographers car by banging it up with her umbrella," the source says. "There's no evidence that Britney's any saner than she was that day. In fact, she appears far
worse."