This could also make her 62 years old in the 1851 census as claimed, since her birthday was most likely after the census date in 1851, so Fulletby seems to be the place and her elder sister Rebecca would give an indication why Mary's eldest daughter received that name. Bastardy Bonds sadly often haven't survived, but would be the expected thing in this situation. Yes of this parish means only a few weeks (if I'm not mistaken 21 days), still why was she of that parish when she had literally just had her baby elsewhere, where were her parents living at the time? was she staying with relatives at time of marriage or birth (one of my ancestors went on a convenient holiday to relies)? or did they find a quiet little parish to marry in? Land tax records or poor rate payments etc may help with the question of where her parents lived at the time, providing she even still lived with them