It didn't occur to her that it wasn't loud enough until you brought it up. But she had to think on it for a bit before being sure the volume actually needed an increase. I've lived that one.
Also:
Husband notices the sun in my eyes.
"Do you want the blinds closed?"
"No, I'm OK."
A minute or two pass.
"Would you please close the blinds?"
"I thought you said you were fine."
"I changed my mind."