Hi,
I took a look at NB archives online and found some info that may show your Gladys was descended from Joseph and Eunice.
From your surname I am assuming that Gladys was wife of Joseph Hatfield
This is the info I found
Joseph Wilfred Hatfield, age 30, son of Joseph Hatfield and Ada M. Mellick
married Feb. 16, 1932 - Saint John, NB to
Gladys May Potts, age 19, daughter of Roy F. Potts and Mabel Mitchell
Roy Flewelling Potts born June 24, 1887 Saint John, parents Frank Lesslie Potts and Elizabeth May Flemming
this was a delayed birth record from 1952 - with his Aunt Mary Elizabeth Green giving the info
Frank Leslie Potts , auctioneer, died Jan. 7, 1926 - age 57, born May 20, 1868 Saint John
parents Joseph W. Potts and Eunice Battles
I did not find a marriage for Roy and Mabel though so cannot say absolutely that this is the same Roy in birth record but sure seems to fit.
there is a border crossing Canada to US dated Feb. 1918
POTTS
Mabel, age 28, Canadian
Gladys, age 5, Canadian
both going to husband/father Roy F. Potts 176 Duke St.
last permanent address: Saint John, NB
final destination Eastport, Maine
it asks if ever in US before and says yes - May 1917
it says they are going to visit Mabel's father O. Mitchell, 15 Franklin St.
Mabel shown as born Eastport, ME and Gladys as born Saint John, NB
there is a WW1 attestation paper for Roy Flewelling Potts - address 176 Duke St. St. John NB
wife Mabel Potts, same address
Roy's birthdate shown as June 24, 1890 (so 3 years off from the birth record, but his Aunt could
certainly have gotten the year wrong after more than 60 years ?)
the attestation was declared Oct. 3, 1917 Toronto
since Mabel was born in ME and I did not find their marriage in NB I looked in Maine records and found it.
June 21, 1911 Eastport ME
Roy Flewelling Potts age 23, auctioneer, born St. John NB
father F.L. Potts, auctioneer, born St. John, NB - residence St. John, NB
mother Lizzie M. Fleming born St. John, residence St. John
AND
Mabel Laura Mitchell, age 22, born Bocabee, NB
father Orville Mitchell, factory employee, born Bocabee NB residence Eastport ME
mother Matilda E. Harris, born St. George NB, residence Eastport ME
so this matches with the birth record for Roy as to his parents names
and it also shows that his father was an auctioneer which matches with the death record for Frank Leslie Potts, son of Joseph and Eunice
so it does seem to all match up