I might have made a link between Charlotte and the other Greens
A week before her own marriage in 1871, Charlotte's daughter Sarah seems to witnesses the marriage of Ellen Andrews, 38, no father listed, to a John Kinsla. The signatures of witness and bride look identical to me
in 1881 Ellen Kinsla is widowed, and has daughter Alice Green b c1861 living with her
1871 Ellen is single and Alice and son Albert F (b c1859) are with her. All using the surname Andrews
1841 there's an Ellen Andrews aged 7 in Rockbourne, living with James Andrews a labourer and presumed wife Mary. Both are 50-55 and the oldest child at home is over 20, so it's possible that Ellen is their granddaughter, especially as she's listed at the end, out of age order, and there's another 7 yr old in the household.
I wonder whether Ellen is Martha/Jane's daughter and so George Green's stepdaugher. She might use his surname at times, which would explain Alice being called Green.