From a descendant John Coupe, she had 11 children and she died of consumption.

Death year and location from John Patchett
Also from John Patchett Marriage between John Coupe and Mary Stoakes May 21, 1835 at Our lady of Egmanton Anglican Church. (Philmore's registery, Nottingham Family history Society.)

A working theory is Mary is the daughter of John and Susanah Stoakes
Facts:
1. In the 1841 census the only Stoakes in Egmanton were John Stoakes, age 50, farmer, born in Nottinghamshire and Susanah, age 50, farmer, born Nottinghamshire. Also at this house WIlliam Bills, age 35, agricultural servant and WIliam Coupe, age 5, born Nottinghamshire.
2. In the 1851 census the only Stoakes in Egmanton are John Stoakes, age 60, farmer of 110 acres employing 1 labourer, born Ordsall, Nottinghamshire, his wife Susannah Stoakes, age 66 (or possibly 60), born Egmanton and their servant Hannah Stoakes, unmarried, age 25, house servant, born Grafthorpe, Nottinghamshire. [They are listed just before the Coupe family]
3. In the 1861 census the only Stoakes in Egmanton were John Stoakes, age 70, schoolmaster, born Ordsall, Nottinghamshire and his wife Susanah Stoakes, age 71, born Egmanton
4. Pallot’s Marriage index has the marriage of John Stoakes and Susanna Johnson in Egmanton in 1816. [Thus John and Susannah would be about 25 years of age]
5. Mary Stoakes was born in 1816 or 1817.
6. John Stoakes was baptised August 28 1790 in Ordsall, Nottinghamshire, father Samuel Stoakes, mother Hannah
7. In the 1834 and 1836 Poll books for Egmanton John Stoakes is listed as an occupier of house and land. [No other Stoakes listed] George Johnson, Freehold land
8. John Stoakes is listed in the April to June 1868 death index, age 77, Southwell district [which includes Egmanton], volume 7b, page 183
This suggests John and Susannah are Mary’s parents since
1. Mary Stoakes was born in Egmanton and they are the only Stoakes I can find.
2. Mary was born shortly after their marriage and thus could be their eldest child.
3. John and Mary’s child William seems to be listed twice in the 1841 census, once with his parents and once with his presumed grandparents.
4.. Mary and John’s children’s names
a) The first son was named after John’s father William
b) The second son was named after John and also Mary’s presumed father John.
c) The first daughter would presumably be named after Mary’s mother Susannah
d) The second daughter Mary Jane was named after Mary and also presumably after John’s mother Mary.

Baptism date and location, death year and burial date and location from John Patchett.

From John Coupe a descendant, in Egmanton the name Coup was pronounced “Cowp”. The family adopted the name Coupe about the time they moved to Manchester.

England Select Births and Christenings - Saint Martin, North Leverton, Nottinghamshire
Baptism May 24, 1812, John Coupe, father William Coupe, mother Mary

Nottinghamshire Church of England Baptisms, St. Martin North Leverton cum Habblesthorpe
John Coupe son of William Coupe and Mary Coupe, baptism May 24 1812

Pallot’s Marriage index John Coup and Mary Stoakes, 1835, Egmanton

Parish Records - Our Lady of Egmanton, Egmanton, Nottinghamshire
John Coup of this Parish Bachelor and
Mary Stoakes if this Parish spinster
were married by Licence this 21st day of May, 1835
by me Edward B. Elliott (Vicar of Tuxford)
John Coup, Mary Stoakes
In the presence of Samuel Sudbury and Martha Coup

In the 1841 census Egmanton, Kneesall, Eakring, Nottinghamshire
John Coupe, age 30, wheelwright, born in Nottinghamshire
Mary Coupe, age 25, born in Nottinghamshire
William Coupe, age 4 born in Nottinghamshire
Susan Coupe, age 2, born Nottinghamshire.
John Coupe, age 6 months, born Nottinghamshire
Mary Gale, age 15, female servant, born Nottinghamshire
[There are 405 names listed in the Parish of Egmanton in this census. The only other Coupes is a William Coupe age 5 staying with the Stoakes family. Possibly William Stoakes is listed twice, with his parents and possibly his grandparents John and Susanah [as spelled] Stoakes , farmers, both aged 50]

In the 1851 census Egmanton, Nottinghamshire.
Head John Coup, age 38, Wheelwright employing no men (Master), born Leverton, Nottinghamshire.
Wife Mary Coup, age 34, born Loply?, Yorkshire. [I wonder why the change of birth location?]
Son William Coup, age 14, born Egmanton
Daughter Susannah Coupe, age 12, scholar, born Egmanton.
Son John Coup, age 10, scholar, born Egmanton.
Son Richard Coup, age 5, born Egmanton.
Son Samuel Coup, age 3, born Egmanton.
Son Frederick Coup, age 1, born Egmanton
[The previous home is as follows
Head John Stoakes, age 68, farmer of 110 acres employing 1 labourer, born Ordsall, Nottinghamshire.
Wife Susannah Stoakes, age 66, born Egmanton.
Servant Hannah Stoakes, unmarried, age 25 house servant, born Grassthorpe?, Nottinghamshire.]

In the 1861 census 103 York Street, Chorlton on Medlock, Manchester.
Head John Coupe, age 48, publican, born Leverton, Nottinghamshire.
Wife Mary Coupe, age 44, born Egmanton, Nottinghamshire.
Daughter Susannah Coupe, age 22, unmarried, waitress, born Egmanton, Nottinghamshire.
Son Samuel Coupe, age 13, errand boy, born Egmanton.
Son Frederick Coupe, age 11, grocer’s apprentice, born Egmanton.
Daughter Mary Jane Coupe, age 7, scholar, born Egmanton.
Daughter Anne Eliza Coupe, age 3, born Egmanton.
Daughter Betsy Coupe, age 10 months, born Egmanton.
[I believe Susannah’s daughter Elizabeth Martin Coupe was boarding with the Gale family in Egmanton at the time of the 1861 census.]

In the 1871 census 47 Gartside Street (Queens Arms), Deansgate, Manchester
Head John Coupe, age 58, beer house keeper, born Nottingham, Nottinghamshire.
Wife Elenor Coupe, age 52, born Manchester, Lancashire
Daughter Anne E. Coupe, age 12, born Nottingham, Nottinghamshire
Daughter Betsy Coupe, age 10, scholar, born Nottingham, Nottinghamshire.
[Obviously John Coupe remarried]

In the 1881 census 1 Grove Street (Queen’s Arm), Deansgate, Manchester
Head John Coupe, age 68, widower, beer house keeper, born Leverton, Nottinghamshire.
Daughter Annie E. Coupe, unmarried, age 23, housekeeper, born Egmanton, Nottinghamshire.
Daughter Betsy Coupe, age 20, assistant mistress in Public Elementary school, born Egmanton, Nottinghamshire

Parish Records St. John the Evangelist, Farnsworth with Kearsley, Lancaster
Burials John Coupe, age 76, buried July 24, 1888

England Select deaths and burials
John Coupe, age 76, of 86 Church Road, buried 24 July 1888, Farnworth-Kersley, Lancashire, ceremony by Thomas Quick.

In the July to September 1888 death index John Coupe, age 76, registration Bolton, Lancashire, volume 8c, page 153.

From www.gravestonephotos.com
St. John the Evangelist, Farnworth, Lancashire
John Coupe born 1822 died 1888, age 76
Mary Coupe born 1816 died 1864, age 48 wife of John Coupe
Annie Eliza Coupe born 1858 died 1914, age 56 daughter of John Coupe
Betsy Coupe, born 1860 died 1931, age 71 daughter of John Coupe