... what it is that drives some people. I'm going to be vague, here, because I must. So if you're going to be bothered by a lack of clarity, perhaps you should come back tomorrow, for Haiku.
I see this happen all the time. A marriage breaks up. People who once loved each other, enough to commit to spending their lives together, enough to bring children into the world together, will learn to hate each other. Will learn to do terrible things to each other in the name of that hatred.
Sometimes it isn't both sides. Sometimes it's only one side - but the hate and the spiteful stuff is there - one being evil, and one suffering.
And sometimes kids are put right in the middle.
And at one time, these people will have been in love with each other.
I wonder just what it is that happens. I wonder why. And I have no answers.