Britney Spears and Kevin Federline

Britney Spears has been stretching her maternal legs in preparation for the birth of her first child in September, by attending a birthday bash for her husband Kevin Federline’s two children (with his ex-wife Shar Jackson) at the weekend.

The pair had failed to turn up to a party for Jackson and Federline’s son Kaleb’s first birthday a fortnight ago so made amends by attending the celebration - for Kaleb’s birthday and his sister Kori’s 3rd birthday - in Malibu on Sunday.

Although, according to a close source, they didn’t really get into the swing of things: “it was a cowboys-and-Indians theme, but Britney and Kevin were the only ones not dressed up. Britney and Shar hugged when Britney arrived, but after that they had no interaction.”

Apparently, they only dress up these days if it’s for the cover of a magazine