While Rome was very much a patriarchal society, women had a way of gaining more freedom as citizens. Sadly, about half of Rome’s children died before they reached the age of 10, and one in four infants didn’t survive their first year alive, either due to injury or illness. Because of this, mothers who had at least three living children were recognized as legally independent by the government.
All historic evidence is just stories. So, just because you don't know of it doesn't mean it doesn't exist...