Well it's possible I guess..... I can't recall whether I have seen that entry or not, it's been a while and I'm out of touch... and I can't check it easily 'cause my ancestry.com membership has lapsed........
I do know that Sarah was a widow and living on Broadhurst farm (as previously noted)in 1851 and the George that was with her then I think was a nephew maybe or some other such close relative.
Is it possible to have a look at Broadhurst farm in 1841 and see who was living there?
Thomas Potten and Sarah and daughter Ann does seem to fit though as Ann looks the right age (more or less) to be 'our' Sarahs Ann as she was born around 1828.
It's possible that Thomas and Sarah were married in Kent maybe 'cause I have seen other Potten's who are from Kent, and I had wondered about that previously. Also Sarah the widow's eldest son was called Thomas.... and since the first child was usually named after a parent or the grandparents it looks likely to have been Thomas.
Has anyone seen a death registration for Thomas Potten Snr? Another thing to check maybe, and maybe Sarah's death cert might be of help (you know, states "widow of such and such"??).
*sigh* all things to think about... and possibly Sue already has looked into all this... hello Sue??
Ciao!!