KEVIN FEDERLINE played the perfect estranged husband on Saturday evening when he took his baby sons to visit their troubled mother in rehab.

The dancer-turned-rapper visited Spears alone on Friday and returned to the Promises facility in Malibu, California 24 hours later with the couple’s kids SEAN PRESTON and JAYDEN JAMES.

The pop star checked herself into Promises last week after two previous check-ins proved to be pointless – she checked out the same day.

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