That's what you thinks!
3 seconds sound clip from the Gone with the Wind (1939) movie soundboard.
You can hear this line at 02:12:58 in the Blu-ray version of the movie.
Quote context
[...]
- I'm going to Atlanta for that 300 dollars, and I've got to go looking like a queen.
- Who's going to Atlanta with you?
- I's going to Atlanta with you, with you and that new dress.
- No use to try to sweet-talk me.
- I knows you ever since I put the first pair diapers on you.
- I said I's going to Atlanta with you, and going I is!
[...]