Kevin Federline has temporary custody of sons Sean Preston and Jayden James while estranged wife Britney Spears is in rehab, and he took them to Las Vegas at the weekend. According to People magazine, Federline and his two sons from his marriage to Britney Spears spent the weekend together in Las Vegas, where the wannabe rapper was making a scheduled appearance at the Mirage Hotel and Casino's club Revolution. A source revealed, "You could definitely tell he was on his best behavior. He was having a good time, but wasn't the wild Kevin of before." Last Saturday, the 28-year-old arrived in Vegas with Sean Preston, 18 months, Jayden James, 6 months, and a nanny. That evening, Federline had dinner with his family before his appearance at the nightclub. He's determined to show he's a good father and will fight Britney for custody of the tots when she comes out of rehab. A representative for Federline made no comment about the custody battle. | 
