69 year old man accused of fathering daughter's 3 sons

A German man is on trial in Nuremberg on hundreds of counts of rape over allegations he assaulted his daughter for more than three decades and fathered three sons by her.
As the trial opened Monday, Adolf B. admitted to the court that he had frequent sex with his daughter, now 46, but said it was consensual, the dapd news agency reported.
But prosecutors say the 69-year-old, whose last name hasn't been released, beat his daughter and threatened her with a knife to force her to have sex with him, starting when she was 12 or 13. She had three sons by him, all disabled, and two died as infants.
He's charged with 497 counts of rape and additional charges of incest and faces 15 years in prison if convicted.