Superpower Nap
It would be great if you could still feel close to your loved one even though you’re separated. It might seem like you and your spouse don’t see each other very often if you have to commute vast distances or work different shifts. So, you could find that you and your partner are longing for the simple pleasures of being together again, such as having a sleep.
Even though the narrator and her spouse are at a loss to describe how it works, it seems as though their naps together are a mystical link that keeps them feeling close even when they are sleeping at different times and in different places. It’s great to know that something as mysterious as that feeling was able to provide the OP and her spouse with a moment of happiness and fulfillment that cannot be explained by science or reasoning.