Britney Spears has reportedly reunited with her youngest son. The 42-year-old pop superstar is mother to Sean, 19, and 18-year-old Jayden from her previous marriage to Kevin Federline and even though she has become somewhat estranged from them in recent years, insiders claimed the teenager has been visiting her at her home. The source told People: “Spending time together has made her happy. It’s an opportunity for Kevin and his wife, and the boys are ready to get away from the L.A. microscope.” Upon their divorce in 2007, Kevin – who is now married to Victoria Prince and has Jordan, 13, as wel…