Hayley Mills, Hayley Mills

I thinking about the movie The Parent Trap (the one from 1961 starring Hayley Mills and Hayley Mills). The parents split up when the twin girls were babies so that is why they do not know each other when they meet. The parents had a stupid argument and pride drove them and kept them apart all of these years. At the end of the movie the parents reconcile, admitting that they never stopped loving each other. I was wondering, could a couple really overcome that many years of hurt? Is it possible to reconcile without the help of Hayley Mills, Hayley Mills and a clever Disney plot?