Kareena Kapoor and Saif Ali Khan are being cautious about teaming up for the big screen.

Their last two outings, 'Agent Vinod' (2012) and 'Kurbaan' (2009), proved disastrous.

So, the couple want to be fully convinced before giving their nod to any filmmaker who wants to pair them up on screen.

Buzz is that Saif was offered a negative role in a film opposite Bebo. And guess what?

His character had to beat her black and blue. Now the Nawab could not bring himself to raise his hand on his begum even on screen. He outrightly refused the role.