The new photos in The Sun and OK! Magazine show Britney and her former assistant in what the Sun describes in a "red hot girl on girl session". The assisant, Shannon Funk, reported got friendly with Spears in a L.A. hotel pool and the action was captured by photographers.

The new pictures surface as Federline has initiated new court proceedings against Spears in hopes of gaining princible custody of their two children. Federline's legal team served Funk with a subpoena at Long Beach airport on Tuesday night according to TMZ.

She's been caught before? Apparently Britney was seen having some lesbian fun a few weeks ago as well. - more on this story