For five years, my husband had a strange bathroom routine. Then my forensic-expert friend noticed something concerning. She immediately told me to call the police.

“Did you find it?”

“Yes.”

Diego took a step forward. Lucia didn’t move an inch.

For five years, I had bragged to my friends that I had the perfect husband. He cooked, handled Sofia’s morning drop-off, cared for my father during his hospital stay, and never complained when I worked grueling night shifts at the pharmacy. He also had one habit everyone viewed as a harmless quirk: he cleaned our main bathroom three times a day.

In the morning, after dinner, and before bed. Sometimes he would even wake up at two in the morning to mop the tiles.

I used to joke about it: “Not even a five-star hotel gets scrubbed that often.”

He would laugh and reply, “Let me keep my little compulsions.”

Standing there, a detail I had never questioned hit me with terrifying clarity: nobody else was ever allowed to clean that bathroom. Not me, not my mother, not the housekeeper who came twice a month. Once, the housekeeper tried to lift the floor drain cover to clear a clog, and Diego had rushed out of the kitchen, his voice sharp and furious: “Don’t touch that!” He smoothed it over later, explaining that the old building plumbing backed up easily and released foul odors. I had believed him. I always believed him.

Lucia faked an urgent call from her office. Before slipping out the door, she showed me her phone screen under the counter: