He was a loving husband of many years but then things changed. He was so calm but then something happened inside him. Something snapped and he became a different person. Or did he?
You fall in love, you think you know them, then you realise the mistake. Only then, do you do something you will regret the rest of your life?
Sometimes because of the work you do, love cannot be pursued. Then its is re-awakened with terrifying consequences.