You are in luck, there's a FamilySearch pilot website (
http://pilot.familysearch.org/recordsearch/start.html#start) that has many searchable databases including Massachusetts marriages up to 1915, and I was able to find Amie/Amy, she married in 1898 to Ashley E. Cooper.
Groom's Name: Ashley E. Cooper
Groom's Birth Date: 1868
Groom's Age: 30
Bride's Name: Amy C. Anderson
Bride's Birth Date: 1876
Bride's Age: 22
Marriage Date: 26 Oct 1898
Marriage Place: Wakefield, Massachusetts
Groom's Father's Name: Reuben L.
Groom's Mother's Name: Caroline A. Tuck
Bride's Father's Name: John A.
Bride's Mother's Name: Sophia M. Carlson
Indexing Project (Batch) Number: I04819-9
System Origin: Massachusetts-EASy
Source Film Number: 1843708
Reference Number: 380
Collection: Massachusetts Marriages, 1695-1910
This is her in the 1910 census, both children were born in Massachusetts though they live in New Hampshire.
Amie Y Cooker [Amie Y Cooper]
Age in 1910: 35
Estimated birth year: abt 1875
Birthplace: Massachusetts
Relation to Head of House: Wife
Father's Birth Place: Sweden
Mother's Birth Place: Sweden
Spouse's name: Ashland
Home in 1910: Epsom, Merrimack, New Hampshire
Marital Status: Married
Race: White
Gender: Female
Household Members:
Name Age
Ashland Cooker 42
Amie Y Cooker 35
Elizabeth A Cooker 8
Helen C Cooker 6
Daughter Elizabeth's birth record:
Name: Elizaabeth Anderson Cooper
Gender: Female
Birth Date: 18 May 1901
Birthplace: Wakefield, Middlesex, Massachusetts
Race: White
Father's Name: Ashley E. Cooper
Father's Birthplace: Wakefield
Mother's Name: Amy C. Anderson
Mother's Birthplace: Wakefield
Indexing Project (Batch) Number: C02076-9
System Origin: Massachusetts-EASy
Source Film Number: 2057386
Reference Number: cn88
Collection: Massachusetts Births and Christenings, 1639-1915
And Helen's:
Name: Helen Caroline Cooper
Gender: Female
Birth Date: 06 Jan 1904
Birthplace: Wakefield, Middlesex, Massachusetts
Race: White
Father's Name: Ashley E. Cooper
Father's Birthplace: Wakefield
Mother's Name: Amy C. Anderson
Mother's Birthplace: Wakefield
Indexing Project (Batch) Number: C05433-3
System Origin: Massachusetts-EASy
Source Film Number: 2057437
Reference Number: v 543 p 665
Collection: Massachusetts Births and Christenings, 1639-1915
By 1920 they moved to Vermont.
Name: Amy C Cooper
Home in 1920: Braintree, Orange, Vermont
Age: 44
Estimated birth year: abt 1876
Birthplace: Massachusetts
Relation to Head of House: Wife
Spouse's name: Ashley E
Father's Birth Place: Sweden
Mother's Birth Place: Sweden
Marital Status: Married
Race: White
Sex: Female
Able to read: Yes
Able to Write: Yes
Neighbors: View others on page
Household Members:
Name Age
Ashley E Cooper 51
Amy C Cooper 44
Helen C Cooper 15
And 1930 they are back in Massachusetts, the 9 and 3 year old are grandchildren.
Name: Amy C Cooper
Home in 1930: Malden, Middlesex, Massachusetts
Age: 54
Estimated birth year: abt 1876
Relation to Head of House: Wife
Spouse's name: Ashley E
Race: White
Household Members:
Name Age
Ashley E Cooper 62
Amy C Cooper 54
Elizabeth A Cooper 28
Richard Cooper 9
Madeline Cooper 3 3/12
Also found was Ellen, she married Otto Anderson in 1900.
Groom's Name: Otto H. Anderson
Groom's Birth Date: 1873
Groom's Birthplace: Sweden
Groom's Age: 27
Bride's Name: Ellen Hildegarde Anderson
Bride's Birth Date: 1878
Bride's Birthplace: Wakefield
Bride's Age: 22
Marriage Date: 31 Oct 1900
Marriage Place: Wakefield, Massachusetts
Groom's Father's Name: Anthony
Groom's Mother's Name: Elizabeth Anderson
Bride's Father's Name: John A.
Bride's Mother's Name: Sophia Carlson
Indexing Project (Batch) Number: M02747-9
System Origin: Massachusetts-EASy
Source Film Number: 1843723
Reference Number: pg 608 ln 72
Collection: Massachusetts Marriages, 1695-1910
I have not found Ellen in the 1910 or 1920 census records.