It looks like Kevin Federline could have rekindled his relationship with ex Shar Jackson!

New reports claim that Jackson could be several weeks pregnant with K-Fed's baby, suggesting that Shar and K-Fed hooked up while Brit was in rehab.

Jackson, who already has two kids with the aspiring rapper, recently told "Extra," "I tell my friends I would have 20 more kids."

But when "Extra" contacted Federline's people, they said the reports are not true.

The baby news follows reports that Britney Spears and K-Fed are getting back together.

A Spears' insider said, "Britney's going to freak ¨C she'll see this as a slap in the face.¡±