No, worried is the wrong word. Puzzled would be better. She seems to exert some kind of malign influence on things electrical and/or mechanical in our house. It was some years ago that we first noticed this. She had borrowed her mother's car and when she came in after parking it she announced that all the warning lights – the little pictograms of a battery, an oil can etc – had come alight after she had switched off the ignition and removed the key. I went to look, and it happened to me as well. After Karen had left to go back home, the problem disappeared. Yesterday, she left mid-morning. Soon afterwards, I noticed a knock in the water pipes whenever the hot tap in the kitchen was turned on. It had disappeared by the evening, but returned briefly this morning. There must be something about that girl.
Another bright, crisp day, slightly warmer than yesterday. This afternoon I walked up through Stanmer woods and across the fields towards Ditchling Beacon. Absolutely beautiful. I managed to spend half an hour in the garden during the morning, pruning the passion flower and ... Botheration!! Another senior moment. The name of that plant is on the tip of my tongue. I know it starts with a T - at least, I think it does. Oh well, no matter, I suppose.
Got it! Tamerisk.