Agreed.
Though the fact that he seemed surprised when she asked if he was unwell suggests it's quite usual behaviour for him.
It is reminding me of a nice, but spectacularly low-energy friend of mine. In perfect health, early 50s, sedentary job, plenty of free time, a very hands on wife, and two children aged 11 and 12 when I knew him, but the smallest exertion, or deviation in routine, would see him literally making panting noises to indicate how 'knackered' he was by something as ordinary as taking the children to their swimming lesson on Saturday morning, because his wife, who usually did it, was working, or having the kids' friends over to play after school, or the prospect of a parents' evening this week, or having to buy new school shoes.
She eventually got sick of it and divorced him, but it took him the best part of a year to start having the children in his new house for longer than two hours, because the prospect of having to buy enough plates, cutlery, bedlinen etc for their use was 'too much' and he was 'knackered'.
He was a nice man, but I can see why she ended their marriage.