Incest is sexual activity between family members or close relatives. This typically includes sexual activity between people in a consanguineous relationship (blood relations), and sometimes those related by affinity, such as individuals of the same household, step relatives, those related by adoption or marriage, or members of the same clan or lineage.
The Alliance originally had Incest outlawed, like many other societies, but, at the end of the First Multiverse War, the Alliance arrested numerous individuals across the Multiverse as the during the conflict, many individuals, mostly siblings and Cousins, became involved with each other as a form of comfort in the face of the horrors of the war. The Allied Courts repealed the laws and made it legal across the Alliance, all of which to prevent an increase of Inmates in the Alliance's Prison system. But, incest between parents or Parental figures is still illegal in the Alliance