Kevin Federline visited his estranged wife, Britney Spears, in rehab on Friday.
Britney Spears, 25, is currently being treated at Promises in Malibu. A source familiar with the situation says Kevin Federline, 28, has been involved in her stay there.
The source said:
He cares a lot about her
,
Kevin Federline stopped by the facility on Friday and stayed about an hour and a half.
Britney Spears have two sons together, Sean Preston and Jayden James.
Kevin Federline visited his estranged wife, Britney Spears, in rehab on Friday. 
He cares a lot about her 
