Britney SpearsBritney Spears is reportedly enjoying late-night sexy phone calls with ex-husband Kevin Federline.

Currently under her dad’s control through a conservatorship order, the star, who realised her new single ‘Womanizer’ for digital download last week, has been single since finishing with paparazzo boyfling Adnan Ghalib at the start of the year - and according to sources, is keen to reunite with the father of her two sons, Kevin.

The source claims Kevin told friends that Britney first started sending him sexy text messages and things evolved from there: “The calls got very steamy pretty quickly. It was like having a new girlfriend.”

The source told the News of the World: “It’s early days, but there is certainly still something between them.

“They’ve been talking dirty over the phone and about how much they’d loved each other and how it all went wrong. They now speak at least every other day and Brit makes excuses to call Kevin, saying it’s about the boys.”

But the pair are worried about going public with their new romance: “He thinks she is getting back to her old self. But they’re worried what it must look like after their break-up descended into such a bitter divorce.

“They want to keep it to themselves to see how well they’re getting on before making any grand annoucements.”