Forbidden to ever return to Arrakis, Mohiam is taken into Paul's custody when it becomes known that she is on a heighliner in orbit above the planet. Aware of the Bene Gesserit desire to acquire his genetic material for their breeding program, Paul seeks to negotiate with Mohiam. In exchange for the guaranteed safety of his concubine Chani, and the Sisterhood's acceptance of his decision to father no heirs with the Princess Irulan, Paul offers something of the utmost value: his sperm. This is a complicated proposition for Mohiam, however, because artificial insemination is forbidden in the wake of the Butlerian Jihad.