All right, Lulamae. I guess you know what you're doing.
7 seconds sound clip from the Breakfast at Tiffany's movie soundboard.
You can hear this line at 00:55:29 in the Blu-ray version of the movie.
Quote context
[...]
- Doc, don't you do that. Don't write that to him.
- I'll write him myself and tell him I want him here with me. I'll take care of him. Don't you worry.
- You're talking crazy, Lulamae.
- Doc, stop calling me that. I'm not Lulamae any more.
- All right, Lulamae. I guess you know what you're doing.
- Keep an eye on her, will you, son? At least see she eats something once in a while.
- Please, Doc. Please understand. I love you, but I'm just not Lulamae any more. I'm not.
- You know the terrible thing, Fred, darling? I am still Lulamae.
[...]