Hi,
When Lucy Green marries Benjamin Marriott her Father is shown as George Green, a Miner.
On the 1861 census South Normanton
Piece 2425
Folio 67.
Ann Green born 1853 is living with her Grand Parents George & Mary Ann Green, as Grand daughter.
There is also another child Mary Green aged 6, listed as Grand daughter, however her mothers maiden name is Thompson, presumably the wife of one of lucey’s brothers.
Because Ann is bpt., as dau of Benjamin and Lucy it can be assumed that Benjamin was her Father also at the time of bpt., she was living with them.
Have you found Ann in the 1871 Census? She is not with Lucy & Benjamin and not yet married.
Spendlove