I shop online for the dcs.
When we have to get occasion wear, I look online and have a very good idea about the stuff I think will do and then we are in and out like butter off a hot knife.
Luckily I know what looks good, and which colour suits, and my budget.
My mum made all our clothes, and I can make my own, so I know a lot about fabrics, cut, texture and fit.. I love couture.
I think it's difficult if the child is overweight/ obese as very few clothes suit, or fit right, and, as it's hot in change rooms, they were probably sweating and feeling dehydrated.
OP I wouldn't feel sad, but the mum probably had low self esteem issues too.
That's true nannynoss, people only see a small snapshot of your life.