Rosa, the pool technician, raised a related concern in early August. She called from the backyard while I was at work and asked whether I had been entertaining unusually large groups. The sanitizer level was lower than she expected, and several readings suggested heavier use than my usual routine. I told her I had allowed neighbors to swim more frequently than planned. She said that was perfectly manageable with sufficient notice, but she needed accurate information about usage to maintain safe water conditions.
"If you have ten people in the pool on Saturday and I think it's only you, my treatment schedule may be wrong," she explained. "It's not the end of the world. Just let me know what is happening."
The embarrassment I felt during that call surprised me. I was the person paying for the service, yet I found myself apologizing for activity I had not arranged. Rosa was not assigning blame. She needed information. Sandra, on the other hand, had behaved as though the cost and practical consequences of her visits were someone else's administrative inconvenience. I made a note of the conversation, though I had not yet begun what would become the formal documentation file.
I approached Sandra that evening. She stood on her driveway watering potted flowers, using more water than the plants appeared capable of absorbing. I explained that the pool service had noticed substantial additional use and that I needed to return to the occasional, arranged visits we had originally discussed. I said the children were welcome on selected weekends if we agreed on the time in advance, but I did not want anyone entering my property in my absence or bringing guests without permission.
Sandra laughed lightly. "You make it sound like we're running a public recreation center."
"That's exactly what I don't want," I said.
She narrowed her eyes. "I thought you enjoyed having people over."
"I do, when I invite them."
She promised to be more considerate. I believed, or at least hoped, that the conversation had been sufficient. When people say they understand an ordinary boundary, you tend to assume they will adjust their behavior. The following week she asked permission for two visits and kept to the agreed hours. I began to relax. Then I had a deadline at work that required an overnight stay in another city, and the real problem revealed itself in my absence.
I returned late on Thursday and found the gate latched but not locked. I had left it locked. During a maintenance visit I had left a spare gate key briefly accessible, and afterward I could not account for it. On the patio table sat a sunblock bottle I did not recognize, and the decorative stones around one corner of the pool had been scattered. Sandra did not answer when I rang her bell. I sent a message asking whether anyone had entered my backyard while I was away. She responded the next morning with a cheerful sentence about how the children had only cooled off for a little while and hoped I was not upset.