I am trying to be charitable, because I know you feel the cold more as you get older. And I also know your sense of smell goes. But my mum drives me mad.
Invariably, she gets herself chilled on the journey up, and comes in shivering. I prepare for her coming by setting the heating around 23, putting clean blankets on every sofa, putting a stack of blankets and a thick duvet in her room, etc.
She will be wearing various layers of clothes, none of them terribly clean, with a jumper that has obviously not been washed for several weeks (she is quite open about this). In the heat, it starts to smell. Then either I swipe it off her with a cheerful 'just putting a wash on and I'll pop this in too,' or I struggle on.
Inevitably, jumper or no, she will do something like pottering round the garden without her coat, or going for a bracing walk in the rain, and she will start shivering piteously. At which point my dad will leap up and ask in concern 'is the heating even on?!' while theatrically feeling up the (boiling) radiators.
I turn the thermostat up to 24 and DD strips to her vest.
Mum refuses a bath or a shower (which might warm her up) on the grounds it is far, far, far too chilly to think of such a thing. If I am lucky, she will tuck a clean blanket over her filthy jumper. If not, dad will start telling me how heating really needs to be over 18 and this 'very very cold house' is a false economy. He'll fiddle with the thermostat and express concern that it doesn't seem to heat much.
DD goes bright pink and becomes listless.
Sometime around 11pm, I will surreptitously turn the heating back down to an artic 22. Then it stays on all night.
In the morning they will finally declare they are quite warm enough, thank you! Until the next time mum decides it's absolutely crucial to spend three hours in my garden in the frost, wearing a coat designed to protect you from light summer showers. And then we're on to round two.
Invariably, I will be told sadly how my 'very cold house' is all to blame.