Sorry. My sister's, not yours.
4 seconds sound clip from the Mrs. Doubtfire movie soundboard.
You can hear this line at 00:47:07 in the Blu-ray version of the movie.
Quote context
[...]
- Well, my sister was the fruit of their passions.
- Sorry. My sister's, not yours.
- You see, she's not a very good housekeeper, but she makes a fabulous cup of English tea.
- Really? Well, I would adore a good cup of English tea.
- Oh, wouldn't we all? I'll go get her.
- Sis! Oh, sis! Sis, you in here?
[...]