[Skybird]

The "couple" is split since years. The court case to the latest instances has been pushed by the brother alone.

His sister was held as not fully liable, since she was assessed by psychologists to be an extremely labile, fearful personality who was in a state of dependency and submission to her brother.

Both came from a broken home, with a background of sexual abuse by the father.

The sister says she feels guilty and has separated from her brother, saying she never wants to see him again, and having said several less nice things about him. She now agrees that incest should be forbidden,

Two of their four children have handicaps. Which to me is the primary and decisive argument why incest should remain to be under penalty. There is a simple biological reason why societies in all cultures and since many centuries if not millenia raised taboos over incest. So the primary argument against tolerating incest is a hard-facted biological one, not a soft moral one.

That a German federal judge once ruled against his colleagues, accusing them that their consideration of biological-genetical risks of incest borders eugenics, imo is a scandal. Seems to be another one of this infamous "anything goes" crowd.