Do you have any information about the port of departure? Perhaps she lived for a while in Nantes, but I don't think she was born there. I found nothing.
There is a BRIDON Anne, Clémence who was born in Dun-sur-Aron, Cher in 1867 (january 27th). But it's difficult to know if it's the right person. (Father: BRIDON Claude, mother BRISSET Jeanne). In 1872, the family was living in Bussy (Cher).
Anne's sisters: Marie and Jeanne.
Tornezy ? Was that her husband family name?