I am afraid that at this moment in time I have no indication of the father of the Elizabeth who married John Sansum. The Parish record microfiche says only that she was from Marston. I will have to do more research being has she is my gtgtgtgtgrandmother.
The Elizabeth, daughter of James & Elizabeth baptized 1856 could be her, shaving 4 years off of a woman's age when she got married is not unheard of.