Dragging on

I really don't understand, why are my parents taking so long to get down to it? They have decided to divorce since last year but till now, they haven't sign the papers yet. I'm not really into the favour of them divorcing, but since they have already decided, why drag? "Get it over and done with", this was taught to me when I was in secondary school, can't they understand the simple logic: 长痛不如短痛 . If only they can undertand this.