Britney Spears & Kevin Federline Hot Phone Sex!

There's no trouble with Britney Spear's phone connection!

Earlier this week, the pop star met her ex-husband Kevin Federline in court, where Britney was granted "expanded" visitation rights of their children. But their interaction hasn't been limited to court appearances — Britney and Kevin are in regular contact. In fact, they've been having weekly steamy phone sex sessions.

Recently, when Britney was having a sleepless night, she decided to call Kevin at nearly 2 a.m. While they initially chatted about their boys — Preston, 2, and Jayden, 20 months — the conversation shifted. And as Britney hoped, Kevin knew exactly how to tire her out — with hours of erotic talk!

"They have phone sex often — at least once a week," an insider tells Star. "The one thing those two have in common is their need for sex, and after they get going, there are no holds barred."

Will they take it to the next level? Should they?

Pick up the new issue of Star — on sale now — for all the dirty details about their secret sex life, including why she's limiting their sexual contact to their phone encounters. Plus: Is it love again for Britney's parents? Get the scoop.