I knew the moment I arrived home that something in my domestic surroundings was not quite right.
When you've cohabited with the opposite sex for many decades, you can automatically sniff when there's an edginess in the air, suggesting you're in the dogbox, for reasons unclear.
Having volunteered to manage the caregiver's retail business over a weekend, I returned after a wearisome Sunday's trading expecting words of sympathy and kindness, perhaps even a well-made drink placed gently in my hand.
Instead, there was a stiffness in the way the caregiver was preparing a special dinner of boned lamb, cooked, I was gratified to note, in my favourite Italian manner, simmered very slowly in white wine, herbs and honey.
"What's wrong with your mother?" I whispered to my 9-year-old as I set the dinner table.