Jane trains her slave for better breath-holding, because she wants to have a good face seat.
First she sits on him and takes his face in her tits, it's a nice way to hold the breath between these two amples.
The she uses her hands for closing his mouth and nose, classical HOM.
And after more titsmother wellness she turns around and uses her ass for steeling finally his air-supply.
She controls with the stopwatch if he gained the breathhold ability.....
Between her ass-cheeks he has no chance and must hold longer... Ass wins!!!
Jane has her slave on a gym ball, ready for an education in breath-holding.
First she takes his airsupply with her ass, she sits on reverse his face, let his nose deep in her ass-crack...
There is no fresh air ;-)
After this, she controlls his breathing with hands over his mouth and nose (HOM).
Then he gets for reward a nice titsmother, may be here is the air better than in her ass-crack
It seems to be, that he needs to improve his breath-holding technique, so the game begins again in her ass-crack.