Is there an idiom for not "applying a double standard"?
I hope that if we find out his dad is the guilty one instead of her dad, he doesn't apply a double standard and does what he told her to do to herself.
This is too wordy, I am wondering if there's a good expression for this. I think "take up own advice" could be used, but sometimes there's no advice, and the person doesn't give an advice and says something harsh or worse.
The example is quite hard to follow without more context, but whatever it means, I think one of these expressions applies:
They're both used idiomatically in a situation where person A declares an appropriate punishment for person B because they committed a particular offence, and then it turns out that person A actually did this offence, and we hope that person A accepts their own declared punishment.
We use this often with politicians who scream that some other politician should resign for lying/doing drugs/seeing a prostitute/whatever, then that politician is caught doing the same thing and inevitably has a different opinion on what his own punishment should be.
What's sauce for the goose is sauce for the gander.
