Of course, if I had seen your sister first, this would've been an entirely different story.
5 seconds sound clip from the Harvey (1950) movie soundboard.
You can hear this line at 00:34:58.180 in the Blu-ray version of the movie.
Quote context
[...]
- Oh, yes, yes. These things are often the basis of a very long, warm friendship.
- It wasn't Dr. Sanderson's fault, Mr. Dowd. It was mine.
- Oh, no, the responsibility is all mine.
- Your attitude may be old-fashioned, Doctor, but I like it, like it very much.
- Of course, if I had seen your sister first, this would've been an entirely different story.
- I think the world and all of Veta, but I had supposed she'd seen her day.
- You mustn't attach too much blame to her, Mr. Dowd. You see, she's a very sick woman.
- Why, she came in here insisting that you needed treatment. That's perfectly ridiculous.
[...]