<P> In Germany, incest is legally defined as vaginal intercourse between lineal ancestors and descendants (parents, grandparents, great - grandparents and their children, grandchildren, great - grandchildren) and between full and half siblings . The penalty is a fine or up to 3 years of prison . Incest between relatives who are minors (below 18 years old) at the time of offence is not punishable but remains a crime, therefore aiding and abetting of incest between related minors is punishable . </P> <P> Regarding marriage, the same rules apply and prohibit marriage between aforementioned relatives . </P> <P> The criminal liability of incest among consenting adults is disputed in Germany . In the case of Patrick Stübing, the Federal Constitutional Court ruled in 2008 that the criminalization of incest is constitutional in a 7: 1 vote with one judge dissenting . </P> <P> In September 2014 the German Ethics Council recommended that the government abolish laws criminalizing consensual incest between adult siblings, arguing that such bans impinge upon citizens . </P>

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