So she desides to sit on his throat, breathing under her weight is nearly impossible... so the face gets red.
Then for some fun she does buttdrops on his belly and chest and moves back with bouncers to his throat and face.
With a electrical vibrator she tickles him... still his face in her ass.
Turning around and moving on his belle, she uses his face as footstool... happy inhaling the aroma of her toes.
She has a happy time playing on her slave until he's red.