Answer:
Prolonged
Explanation:
The passage says : There have been a few rough patches where their differences in interests caused them to think about breaking up, but they stuck together. Meghan began thinking about having children. Kurt had not been sure if he wanted children but finally decided to propose to Meghan, reluctantly, and get married before starting a family.
Their reluctance in making up their minds in most decision taking aspects correlates with a prolonged trajectory.