Complex sentence: She was productive during this time as well though, becoming a very notable historian, writing at least twenty works on Muad'Dib and recent event; and, too, keeping personal discipline in never taking up Paul's offer to discreetly cuckold him for her own pleasures.
Split into simpler sentences: She was productive during this time in her role as historian, writing at least twenty works on Muad'Dib and related events. In addition, she never indulged Paul's offer to discreetly cuckold him for her own pleasures.