Now, you're making me feel like the proverbial stepmother.
5 seconds sound clip from the Miracle on 34th Street (1947) movie soundboard.
You can hear this line at 00:21:29 in the Blu-ray version of the movie.
Quote context
[...]
- I thought, as long as we're here, we might as well say hello to Santa Claus.
- He's a nice old man, Mother, and those whiskers are real too.
- Yes, yes, dear. Many men have long beards like that.
- Susan, would you stand over here a minute? I want to talk to Mr. Gailey.
- I shouldn't have brought Susie to see Santa Claus, huh?
- Now, you're making me feel like the proverbial stepmother.
- I'm sorry, but it's just that I couldn't see any harm in just saying hello to the old fella.
[...]