K-Fed Visits Britney In Rehab On Friday

Kevin Federline had worried about Britney and his two sons. He went to Promises in Malibu, where Britney is being treated.

Kevin Federline has visited his estranged wife Britney Spears in rehab.Kevin Federline visited his estranged wife, Britney Spears, in rehab on Friday, PEOPLE has learned.

Spears, 25, is currently being treated at Promises in Malibu. A source familiar with the situation says Federline, 28, has been involved in her stay there. "He cares a lot about her," the source said.

Federline stopped by the facility on Friday and stayed about an hour and a half.

On Thursday, Spears's father, Jamie Spears, 54, told FOX News from his home in Louisiana that his daughter is "a sick little girl. ... We're just trying to take care of her."

He added that his daughter's problems are "not about what other people think" and that he and Spears's mom, Lynne, are "concerned about our daughter."

However, reports that Spears is on "suicide watch" are false, her manager Larry Rudolph told Extra on Friday. more on people