OH FGS, some people...
Well, she may not be poor in cash terms, but certainly is in spirit, the language she used certainly indicates she is!
I just gave my neighbour a pair of trainers DS grew out of. I asked if any of her 4DC had size 9.5, and she practically yanked my arm off! They are too big for her lad, but he'll be able to wear them for ages, so I'm really pleased.
I can't bear throwing perfectly good stuff, and would prefer to give them to a person rather than just recycle them. I don't know anyone around here yet, so I was delighted i could give them to her.
Will you have occasion to see that woman again very often? If so, just say to her that you never meant to offend, just noticed her daughter looked about the right size for the jumper, "but anyway, another mum took it, so all's well that ends well etc. No hard feelings youflamingloon!!"