With the sexual liberation movement, we started down a slippery slope. In Germany they may slide a little further by legalizing consensual incest. The story behind the case is very sad; my heart really goes out to them. But legalizing incest is unthinkable in my world. These people need help not affirmation.
The brother was put in foster care at an early age because his alcoholic father threatened to kill him with a knife. As a grown up, he found his birth mother. She had a daughter (mentally slow) and a son by a different man. She invited her biological son to stay with them. Family starved, he left his job and moved in with them. The mother had him stay in the same room as the sister. Then she died suddenly. They clung together in grief and one thing lead to another. They now have 4 children together (3 in foster care). They have both been tried. The brother has served time. Now the German Supreme Court is hearing his case and may well move in his favor. You can read the whole story at Speigel Online.