The death of her child had turned her into a wild animal, not caring anymore for her own life. She had attacked him repeatedly, despite his generous overtures to her. In the end, although Erasmus had been tempted to kill her outright, he had not been able to bring himself to do it. Most interesting. He had finally settled for drugging her into a stupor. Now Serena was in one of his laboratories, sedated to the point of catatonia, since Erasmus had found no other way of suppressing her efforts to fight him each time she rose toward consciousness. Alas, he had to time to salvage her now.
Brian Herbert and Kevin J. Anderson, Dune: The Butlerian Jihad (526)