Spiral downwards
As time went on, the couple would argue and bicker at each other more, and the violence would occur again. Jeremy had issues handling his emotions, which is no excuse for his actions, but it was something he had never dealt with before. This made him a danger to himself and the people around him his entire life.
As time went on, the violence in the house would continue and a cycle would form. Carolyn would threaten to leave, Jeremy would apologize, and they would be back together again until it would happen all over again. But one day, Carolyn just had enough of it all and knew something had to be done.