Well, don't look so shocked.
3 seconds sound clip from the Breakfast at Tiffany's movie soundboard.
You can hear this line at 00:10:48 in the Blu-ray version of the movie.
Quote context
[...]
- I don't know that I should even discuss it. Well, they never told me not to tell anyone.
- You must cross your heart and kiss your elbow.
- You probably read about him. His name's Sally Tomato.
- Well, don't look so shocked.
- Anyway, all I know is that he's a darling old man.
- But I adore him now. I mean, I've been going to see him every Thursday for seven months.
- Now I think I'd go even if he didn't pay me.
[...]