Here is the story from CNN Europe of a father in Austria, now age 73, who imprisoned his own daughter in the basement of his home, now age 42, when she was age 18 and father's seven children by her. The father told the mother that the daughter had run away, when in fact he had drugged her and locked her into the basement. One of the children died, three still lived with the mother in the basement and had NEVER seen daylight, and three lived with the father and his wife (mother of the imprisoned daughter). The father brought the three children up from the basement who lived with he and their grandmother and told the story that the daughter had dropped them on the doorstep. The police reported that the mother and the three children had no idea of those living in the basement, as the father had commanded them not to go into the basement; the living quarters having been concealed behind an electronically controlled door.
It is not comprehensible to me how this man could psychologically survive such a situation unless he was completely amoral and without any affection at all. Evil runs rampant!