The story is O. Henry's "The Gift of the Magi"

It's a short one, if you haven't read it yet.

an important part of the story above is her saying that she intends to sell those immediately

if i got a very expensive gift when i needed money i'd first yk, think about it a bit. most likely i'd feel guilty selling said gift, and i 100% would not brag about it to the person who gave it to me

I'm not arguing the status of the recevier. I'm questioning someone who's response to a gift is immediately the monetary outcome. Your example was them selling things that were important to them. This person had not even full received the gift and to the face of the person giving the gift, sad something so socially unacceptable the gift was taken back. Do you think the gift would have been taken back if the giver thought the gift would provide a much needed meal? The tone of the tweet would leave anyone to thing the giver didn't hold a high opion of the other woman if she was willing to take them back.

When did I blame the victim? Why even frame it that way?

I grew up poor and around poor people in poor neighborhoods. It’s what the poor do. You wanna argue about improving their lot, sure, but half the mothers in my neighborhood would sell anything they could for a hit of hope or faux luxury. My own mother stole from me.