[imported_The Vibesman]

This is tough, but I keep coming back to The Maltese Falcon, at the end when Spade tells Brigid that he is turning her in.

Spade: Well, if you get a good break, you'll be out of Tehachapi in 20 years and you can come back to me then. I hope they don't hang you, precious, by that sweet neck...Yes, angel, I'm gonna send you over. The chances are you'll get off with life. That means if you're a good girl, you'll be out in 20 years. I'll be waiting for you. If they hang you, I'll always remember you.

Brigid: Don't, Sam. Don't say it even in fun. Ha, ha, ha. Oh, I was frightened for a minute. I really thought...You do such wild and unpredictable things.

Spade: Don't be silly. You're taking the fall.

Brigid: You've been playing with me. Just pretending you care to trap me like this. You didn't care at all. You don't love me!

Spade: I won't play the sap for you!

Brigid: Oh you know it's not like that. You can't say that.

Spade: Do you ever fight square with me for half an hour at a stretch since I've known you?

Brigid: You know down deep in your heart and in spite of anything I've done I love you.

Spade: I don't care who loves who!! I won't play the sap for you. I won't walk in Thursby's - and I don't know how many other's - footsteps. You killed Miles and you're going over for it.