Hi Steve,
Is she in your direct line? The Wells are also to be found in the Lutterworth Independent registers, though they were of Ullesthorpe. A Martha Wells was formerly a Martha Foxon, baptized 1744 if I remember correctly. I have been trying to connect her to my Martha Foxon who was born around 1776, though I can't find her baptism, so I'm at a brick wall. Aunt and niece maybe? (My Martha was later associated with the Ullesthorpe Independent Church ) I believe Martha Wells did have a daughter Martha around 1773, so the above date could be her death.
Carolyn