Helping someone in need — especially a child with desperate parents — is a good thing.
Helping someone in need when you know there will be no gratitude is an even better thing. Because in that case, you know there will be no reward for you — other than the satisfaction of having done a good thing.
But helping someone in need when the promised “gratitude” is the promise of death and harm to you and yours… not such a good idea.
Good thing this woman doesn’t really value her son’s life, because she likely won’t have him for much longer.