There was a horrible case in Delaware in '85 or '86 where the man participated. The kidnapped baby was found and safely recovered, unfortunately that child and a slightly older sibling wound up being raised by their grandparents, because they became orphans the day of the kidnapping. The deranged woman who claimed the baby as her own had murdered the mother and father.
20 years ago and it still bothers me to no end. It happened only about 2 miles from where I lived, just days before Christmas.
I suppose if a man is living with a woman who is that psycho, he believes he must please her.