X00241: More on Ann Hardy Barnhill and Mary Hardy Hyatt Sisters?

I've posted previously about X00241 and whether Ann Hardy Barnhill and Mary Hardy Hyatt were in fact sisters.

I've recently found Ann Hardy Barnhill in the 1911 census living in Esquesing.

The census record gives a correct age for Ann of 72 years (which she would have been in 1911), but an incorrect year of birth of 1831 (as opposed to 1838). It also says that she came to Canada in 1835, which is incorrect. But if she had said that she came to Canada when she was four years old (which would have been correct) they would have recorded it as 1835.

She's living with her daughter Nancy as well as Everett Barnhill, son of Matthew Hyatt and Mary Hardy. Nancy's relation to the head of household is given as "aunt" and Ann's relationship is given as "Grandma", which further confuses things because if my theory is correct, their relationships would be "cousin" and "aunt" respectively.

So, it looks as if Everett is related to the family, but it's not entirely clear what the relationship is at this point. It looks like I'll have to go back and re-evaluate what information I have at this point.