Does the anachronism matter? It’s actually even braver for using a modern term.
Also, I’m not sure it’s an anachronism. The concept of “wanted” children (that is, wished for by a married couple) and “unwanted” children has been around for a long time, and IIRC the eugenicists of the turn of the century mentioned it. Since, naturally, a “wanted” child would only be one born to an upper or academic class white couple...
I didn’t say anything about “wanted”.
It is good that she did not carry out her desire to kill the baby, although probably just from being scared of that place.
That doesn’t give her a reprieve.