Hi Owly. You curiosity is always very inspiring to me. This is how I see it: North Node is our spiritual wiring. We need to live for something, have some goals in life. When you apply Chiron in this web, with this unorganized need to help others and learn in process, we get a relationship that is in a perpetual state of learning. Since Libra is involved, the craving for feedback may also slow down this relationship. The older the couple gets, the closer it will bring them in terms of being a part of the same mind, and finding similar solutions. Ultimately, it gives a ripened relationship a dimension of thankfulness, where the Chiron person heals the ways that the North Node person is approaching his/her future. Hope this answers a bit.
“People with this aspect may have a calling or destiny to teach, heal or enlighten others. The subject of healing, teaching, or enlightening may have something to do with letting go of pain and transmuting or transcending it. ” http://astrologynotes.org/wiki/ChironconjunctNorth_Node
this is for a natal chart that’s easily adaptable. Yes your instincts are right. Whenever Node is involved it involes a Life Lesson.