Oh, nonsense.
3 seconds sound clip from the The Skin Game (1931) movie soundboard.
You can hear this line at 00:41:25 in the Blu-ray version of the movie.
Quote context
[...]
- What did you ask Dawker, dada?
- Dawker!
- What's this mystery about young mrs. Hornblower?
- Better not ask in front of Jill.
- It's not for a girl to hear.
- What load of rot! I read the papers every day.
- No worse to see in there anyway.
- Do you want your daughter...
- You think I was mother at my age.
- I was not so proud of my knowledge.
[...]