Britney Spears and KEVIN FEDERLINE's families have bonded in an effort to help the pop star work out the personal problems that have landed her in rehab. The TOXIC singer checked into Promises rehab facility in Malibu, California last month (FEB07) and the crisis has helped the two families become closer than ever. The two camps are coming together to care for the Spears and Federline's two young sons, Sean Preston, 18 months, and JAYDEN JAMES, six months. Federline and his mother, along with Spears' mother LYNNE have reportedly grown close while helping Spears work on her sobriety. A source close to Federline says, "There was a lot of distance between the families, but it seems now they all have a common goal, which is to help Britney get better."