Britney Spears tries to get in touch with her sons “at least” once a month. The 42-year-old pop superstar has become estranged from Sean, 18, and 17-year-old Jayden in recent years but now an insider has claimed that things are getting slightly better after they moved to Hawaii with their dad Kevin Federline and she occasionally gets a response when she reaches out. A source told Us Weekly: “The boys can be cold, but they respond occasionally. She reaches out at least once a month. Sean Preston and Jayden are at the age where they’re busy with school, friends and trying to adjust to their new …