- What family business? My family?
- Sure, your family.

5 seconds sound clip from the The Seven Year Itch (1952) movie soundboard.

You can hear this line at 01:39:21 in the Blu-ray version of the movie.

Quote context

[...]

- What are you doing here? And don't call me Dickie boy.

- I just drove in from the country. Got a date with my agent.

- Is that coffee I smell?

- No.

- I'm glad I caught you before you went to the office. I've got some important family business to discuss with you.

- Are you sure that's not coffee?

- I am positive.

- What family business? My family?

- Sure, your family.

- I was driving down, so Helen asked me to stop by and ask you -

- Oh, Helen. Oh, she did, huh? Well, I'm glad she did, because I want to talk to you.

- What's the matter, Dickie boy? You're acting mighty peculiar.

- You think you're pretty fancy, with the blinkers on the horses.

[...]