Reviewed:
The Clan is a religious Sect which believes that all female "daughter" of the Clan are the slaves of the males. This includes Mothers, Daughters, Sisters, Grandmothers, and the wives taken in marriage from outside the Clan.
In this introduction to the Clan and its philosophy, the fifteen year old son is given his mother, as his first slave. His father, as is his right, divorces her and takes his daughter as his concubine.
This chapter, in this Universe, introduces us into the acceptance by her son as the mother becomes the full sexual slave of the child of her loins.
Because of the need to discipline her, the son viciously, as is his right, to whip her bare arse fifty times as she calls out the strokes.
Then she first takes his semen into her throat, and then he loses his virginity to his own mother.
Enjoy, and then read the other stories in the series.