NCIS, Season 3

[Midway through Tony and Ziva's undercover act as married assassins, Abby calls with autopsy results that show the wife was pregnant.]

Ziva:
Something wrong?

Tony:
Just trying to picture you pregnant.

Ziva:
Don't!

Tony:
I have to, I'm gonna be a father! It's a great responsibility.

Ziva:
Maybe it's not yours.

Tony:
Maybe she didn't know.

Ziva:
Oh, she knew.

Tony:
So why take this contract? Put our unborn child in danger?

Ziva:
Perhaps we needed the money.

Tony:
Kids are expensive...

Ziva:
And bullets are cheap. There is a big chance that this meeting is a set-up, Tony.

Tony:
Are you scared?

Ziva:
Nope... excited.