She was very convincing when she wanted to be.
4 seconds sound clip from the Casino (1995) movie soundboard.
You can hear this line at 02:20:44 in the Blu-ray version of the movie.
Quote context
[...]
- I just hope it's not someone who I think it might be. I just hope it's not that.
- I mean, it could get us both killed.
- She was very convincing when she wanted to be.
- And this is how she backed him off.
- Don't forget, if you're challenged if he asks anything, deny everything. You understand?
[...]