Ben Stiller and Robert De Niro are back and up to more hijinks in the upcoming threequel 'Little Fockers.'

This time around, Greg (Stiller) and Pam (Teri Polo) are planning a birthday party for their twins. But after 10 years of marraige and two kids, money is tight, so Greg is forced to take a second job -- working for a drug company -- to support his family. Naturally, Jack has his suspicions, and as the birthday party approaches, typical 'Fockers' hilarity ensues.

In this exclusive clip, watch as Jack asks Greg a number of hard-hitting -- and awkward -- questions.



'Little Fockers' his theaters on Dec. 22.