My car was at the mechanic for new brakes, so my husband Liam lent me his carefully maintained SUV. He treated that vehicle like a second living room and kept it almost impossibly clean. While parked outside the grocery store, I dropped my lip balm into the narrow space beside the driver’s seat. When I reached underneath, my fingers closed around a brass key with a blue rubber cap.

A small pouch nearby held three more keys marked red, green and yellow. I also found a receipt for three duplicate keys made that morning. Liam owned no rental properties or storage units, and these were not our spare house keys. When I called him, his reaction made the discovery worse. He asked which keys I had found and told me to put them back exactly where they had been.

I refused. Liam sent me to a locksmith, where the owner recognized the blue key as belonging to Mrs Palmer. Liam soon arrived and took me to meet her. She was an elderly former client who had once fallen in her bathroom and remained on the floor for hours because nobody nearby could enter. Liam had helped her create an emergency plan. The blue key was a replacement for a copy intended for a retired nurse who lived nearby.

Relief did not explain the other colors. Mrs Palmer sent us to Frank, an older man who lived across the hall from the apartment once occupied by Liam’s father. Frank revealed that Liam’s father had offered his son a spare key several times, but Liam always refused. Then his father stopped answering the phone. Liam and Frank were forced to wait for building management to unlock the door, and by then Liam’s father had died from a sudden medical emergency.

No one could say whether earlier access would have changed the outcome. Nevertheless, Liam carried the guilt. Frank later gave him a green spare key, partly because he lived alone and partly because it comforted Liam. After that tragedy, my husband’s lifelong preparedness took on new meaning. The extra flashlights, emergency supplies, chargers and backup plans were his attempt to ensure that he would never again stand helplessly outside a locked door.

One key still troubled me. I held up the red one and asked whose door it opened. Liam admitted it was for me. He had made a spare for my car after remembering that, long before we met, I had once locked myself out. He had never asked my permission because he feared I might say no.

That answer exposed the real problem. Liam’s intentions were caring, but his fear had led him to make choices about other people’s access and privacy before they could consent. I told him that worry did not give him permission to decide first. He confessed that he still dreamed of standing outside his father’s locked apartment, knowing something was wrong but unable to enter.

I told him the red key was not his burden to carry. He accepted that and pushed it toward me. We completed the route he had planned, delivering the yellow key to its intended owner and the blue replacement to Mrs Palmer’s nearby nurse. Frank insisted Liam keep the green key because he had asked him to carry it.

Later, we stopped outside his father’s old building. I did not repeat that the death was not his fault; Liam already knew that intellectually. What he neded was to release the belief that every locked door was his responsibility.

When we returned home, I held our house key. Liam automatically searched his pockets, then stopped. For once, he was not the person with the backup or the one opening the door. He looked at me, smiled and said I had it. I unlocked our home, and he followed me inside.