The Secretary's Daughter

A woman went to visit her bank manager and she took her young daughter with her. The bank manager said that the woman's daughter could stay with his secretary during the meeting. When the woman and her daughter left, the secretary turned to another secretary and said to her, "That little girl was my daughter." How could that be?

Answer:
This does not involve adoptions, step-parents, in-laws, or grandparents. The little girl was the secretary's daughter and she was the daughter of the woman who visited the bank manager.
The secretary was the girl's father.