This clearly states that you need both forces for any relationship to work. But like I stated above these forces will vary in different relationships. Montgomery wrote this article based on knowing that relational dialectics involves change and maintenance involves stability. To show the difference she brings up a point that contrasts the traditional view of social sciences and dialectics. Montgomery states that dialectics on the other hand, sees the natural state of relationships as change, fluctuation, evolution and movement.
Stability is but a momentary transition in a stream of continuous change.
I think there is a lot of stability in relationships. The daily rituals and patterns that a relationship follows are stability. These things happen everyday to stabilize the relationship. This point is developed more by stating that a tension that comes about will die down but a new tension will arise because of this prior tension. From my own experience I have found that when you are the mediator of two people arguing you are in a situation that will bring about tension after tension .