Why is she so fidgety, thinking, ``There's definitely someone there, but I can't see her''...

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I use a room in my home to give piano lessons several times a week.
This day is the once a year tuning day.
The cat, Aqua, usually sleeps during lessons, and even when strangers come to visit.
He's so friendly that he tries to get close to me, but this time it was different.
"There's definitely someone there, but I can't see them..."
It was refreshing to see such a fidgety Aqua.
While being tuned (about 2 hours)
Please take a look at this short summary of how I feel anxious and unable to sleep and feel restless.
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#This is a record of a story that started because my sons wanted to keep a cat.
#Cat and family
#kinkalow