My Wife: My Seed Harvester

Like most couples, Ron and Kathy's married life had started out with very little money, so sex had been one of their main recreational activities. They had become creative, dabbling in a variety of diversions and perversions from one end of the sexual continuum to the other. But, after fifteen years of marriage, things had got boring. Kathy decides to take matters into her own hands and forces Ron to sign an agreement that gives her total control of his precious seed.
It must not be wasted, it must be harvested only by her. A harvest that only she controls...