There are definite levels of sadism from the denial of sexual satisfaction right up to a terrible painful, nay an agonizing death, which at the hands of the expert sadist can be over a long period of time with disfigurement and dismemberment the norm.
In this universe an enlightened congress has passed a law declaring all females as chattels, and even ordering 14 year old girls to get publicly auctioned off to the highest bidder. If a slave refused the domination, extra punishment was authorized, and if the slave further disobeyed her Master she could be declared Disobedient in the eyes of the Law and she could be punished unto death.
This tale is basically in two parts; the first covering the Master's first wife, and the second the purchase of a 14yr. old slave at the Government Auction from under the eyes of her father.
If you are sensitive to reading about the subjugation of females, maybe you should read some of the Brothers Grimm stories. If however you are not, then Enjoy!