Sensual Facesitting With the Sadistic Mistress

It is evening. Rain and strong winds are driving people into their homes. Slave Ciphers spent the evening in his latex suit at the feet of his mistress, Lady Claire, who was reading a book with relish.
But, seized by a sudden urge, Lady Claire let her slave follow her. She restrains him to the bed, leaving him completely defenceless and at her mercy, and pulls a latex mask over his head, which has only a tiny hole through which air can still flow.
A small hole like that, however, can be covered up very easily, almost by chance. Lying sprawled across her slaves chest, adding to the weight bearing down on him, she makes him fully aware of his hopeless situation, whilst clearly revelling in her schadenfreude.
Lady Claire gradually uses her whole body to cover the hole. First her fingers and feet, then even her round, firm, young breasts, which, against his will, arouses the slave greatly.
With a malicious grin, she begins to ride him through his latex suit, reminding him of something he will never get from her.
Finally, she sits on his face in various positions, so that the only air the slave gets is the air from her pussy or bum, before she simply leaves him lying there and walks away.