Well, it's very simple. She's madly in love with me. That's all.

4 seconds sound clip from the The Big Heat (1953) movie soundboard.

You can hear this line at 00:09:24.615 in the Blu-ray version of the movie.

Quote context

[...]

- Okay, Commissioner, you get the stringy end of the steak.

- What about Joyce? She go to bed all right?

- Just the usual tug-of-war. She had to go to the bathroom a few times, hear three stories, and have a glass of water before she finally went to sleep.

- She's angelic all day. But at night, she's a holy terror.

- That's the way I usually describe you.

- That's what the book says, though, doesn't it? Be patient, but firm.

- The book, the book. Very scientific and calm. Trouble is, the authors have never met our daughter.

- Well, it's very simple. She's madly in love with me. That's all.

- Hey, you know something? That's the conflict between the two of you. You're both in love with the same wonderful guy.

- Right?

- Wrong. We're just used to you.

- Well? How is it?

- It's good steak.

- Thanks.

- You want some beer?

- I'll take a sip of yours.

- You see? That's exactly what I mean. It's a perfect marriage. We share the same scotch, the same cigarette, the same can of beer.

- Among other things.

[...]