It depends.
If the mother is elderly and the daughter is her caretaker, then there is a duty to render aid based on the relationship. If the daughter is 3-years-old, however, there would be no duty to render aid.
Also and again, it depends on the state where this occurs, if the daughter is a trained medical professional or not, etc., etc., etc.
(I noticed that, too, Shay )
Edit to add: A man was caught cheating on his wife (a nurse) and the wife was thinking of filing for divorce. Before she filed, however, her husband had a massive heart attack in their home. Without her assistance, he would most certainly die and she would inherit all of his money (a substantial sum). She saved his life, filed for divorce, and he fought her in court over her rights to property and money. True story.