EXAMPLES FROM THE WEB FOR RED-HOT
His own skin had sizzled under the red-hot brand, he murmured softly.
He could have moved it now for nothing short of a gimlet or a red-hot wire.
A shower of red-hot stones warned him that he was near the volcano.
There was something in her that was red-hot, although she was now a middle-aged woman.
They talked of boxing Augustine's ears when they saw that the stove was red-hot.
It seemed to him that she was pressing a red-hot iron to his neck.
But the bite Camille had given him stung as if his skin had been branded with a red-hot iron.
Granger from his place beside the red-hot stove said nothing, but bowed his head.
And these red-hot prophets in petticoats, how startled they will soon be!
I judge you are quoting from her letter and apparently she piled it on red-hot.