Looking on Rootsweb World connect, If you put in Sarah Finch Suffolk. One comes up, she was born 1800 Bacton and when you click on that, she has the boys I have plus Sophia and Mary Ann. The only difference in John Finch I have him born 22nd May 1836, but the John Finch they have is November, but all the other dates check out. Also there is a Sarah Finch on the 1841 census in a household with a Robert Flowerdew, but if this is the mother why wasn't she with her boys. There is a Sarah Finch died 1845.
Does this help anyone to try and sort out this confusion.
Regards
Gillian