I believe “Mrs” for a single woman was used as a sign of respect. So either in a higher position in society, or perhaps not quite as high, but older in years. I would be inclined to err on her being older.
My attempt at the witnesses. Prepared to be shouted down.

Witness under John might be “Wm”
Looking at other entries, I think the vicar is Atcherley
Amended this because I misread Hannah (Hana)‘S signature as a witness. Idiot!