You have no ethical obligation to drive her into poverty.
Think about it: You're not under any ethical or moral obligation.
It is the ethical obligation of all parents to provide the best care they can for their children.
As an officer of the court in this state, I have an ethical obligation to do that.
Not only will you meet your ethical obligations, you'll also dodge some potential legal problems.
What is my ethical obligation to the immigrants, who must need the money?
Do I have an ethical obligation to get people's permission before taking their picture?
No one has an ethical obligation to cut back on spending during times of war or other national crisis.
Did I have an ethical obligation to care for a person at 30,000 feet?
Is there an ethical obligation for those who oppose the war to support the troops?