I'm not talking to a child. I'm talking to Cathy... my Cathy.

5 seconds sound clip from the Wuthering Heights (1939)) classic radio play.

You can hear this line at 00:18:57 in the radio play.

Quote context

[...]

- He's coming here again.

- Who?

- You know who I mean. That stupid fop, Linton.

- You're unbearable. Utterly unbearable.

- Why are you dressed in silk?

- Because gentlefolk dress for dinner.

- And why are you trying to win his puling flatteries?

- I'm not a child anymore! You can't talk to me that way!

- I'm not talking to a child. I'm talking to Cathy... my Cathy.

- Oh. I'm your Cathy?

- Yes.

- Am I to take orders from you... a dirty stable boy?

- Allow you to select what dresses I shall wear and bow humbly to your horrible, wretched tempers?

- Cathy, where's your heart?

[...]