Case. One partner is in a prolonged downturn; the other carries everything and gradually burns out.
Model. A single working node under double load with no reserve — a classic single point of failure.
What helped. They brought in an external reserve (loved ones, specialists); the supporting partner earned the right to their own support, not just the rescuer role.
Lesson. To support another you need your own reserve. With a persistent downturn — a specialist’s help.
See Resources to recover.