Patrick and Susan are a couple and have four children. They are also brother and sister and that makes their relationship illegal under German law. Patrick and Susan didn’t even know of each other’s existence until Patrick was over 20 years old and Susan was in her teens. After their mother died, they lived together and eventually fell in love.
http://edition.cnn.com/exchange/blogs/in.the.field/
The rundown is that they (as noted above) didn't meet until they were older and have four children (three of which have been taken away). Patrick has been jailed before for his relationship with Susan.
The couple are challenging Germany's incest laws in the highest court, however, if the court decides not to take the case then Patrick will be jailed again.
Many other European countries repealed bans on incestuous love long ago, according to the article.
My view, personally, is that while there are many controversial issues surrounding the topic, that it should not be illegal for them to have a romantic relationship. Perhaps there should be some kind of genetic testing program in place should a pregnancy occur, but I certainly don't think the relationship should be illegal.
Discuss.