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."