I have come to the conclusion, that the 1841 census stating Ann and william sadler are actually brother and sister! Our Ann sadler would have been too young. She had already been married before william, so I believe this one was probably a twin of William, or at least a sister. After Patience died Ann, (sister) moved in to look after the two children. Phew! Got there in the end!I believe Ann Ashby to be williams new wife in 1846. The Ann parker link is wrong as Ann is mentioned in the 51 census, and according to records parker didn't marry till 56'.
So, Ann ashby married William Sadler, while living in Stokenchurch, four years after the death of his first wife Patience. Ann sadler, (sister), on census 41' is only looking after him and the children.