A cousin.

4 seconds sound clip from the Breakfast at Tiffany's movie soundboard.

You can hear this line at 01:45:46 in the Blu-ray version of the movie.

Quote context

[...]

- I wouldn't bet on it.

- What is it, darling?

- Message for you.

- Oh, yes, I see.

- Did he bring it in person, or was it, just there, shoved under the door?

- A cousin.

- Hand me my purse, will you, darling? A girl can't read that sort of thing without her lipstick.

- You read it to me, will you, darling? I don't think I can quite bear...

- Sure you want me to? Okay.

- 'My dearest little girl, I have loved you knowing you were not as others.'

[...]