She was born prior to Caroline's marriage and is named Mary Stent on the 1871 census aged 2. By 1881, she is now listed as Mary Newman.
On May 12, 1889 Mary now 20, married John Wheeler, Coachman, at All Saints, Witley. Mary is recorded as Mary Stent, father John Newman. Both were able to sign their name. Witnesses to their marriage were Frederick and Ellen Card.
Mary and John settled at High Street, Ewell and John was employed as a Groom. They later moved to Epsom where John worked as a Carman/Carrier for a Brickworks. By 1911 Mary and John had 6 children, Ernest John, Mary Emma, Frederick, William, Arthur and Winnie.
Mary (nee Newman/Stent) Wheeler died aged 76 in 1945 in Surrey, Mid Eastern.
Sources
"England Marriages, 1538–1973 ," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:NJPQ-V29 : 10 February 2018), John Wheeler and Mary Stent, 12 May 1889; citing Witley, Surrey, England, reference p 190, index based upon data collected by the Genealogical Society of Utah, Salt Lake City; FHL microfilm 994,435.
"England and Wales Death Registration Index 1837-2007," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVHB-X6M4 : 4 September 2014), Mary Wheeler, 1945; from "England & Wales Deaths, 1837-2006," database, findmypast (http://www.findmypast.com : 2012); citing Death, Surrey Mid Eastern, Surrey, England, General Register Office, Southport, England.
"England and Wales Census, 1881," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q277-LSR1 : 10 December 2017), Mary Newman in household of John Newman, Dunsfold, Surrey, England; from "1881 England, Scotland and Wales Census," database and images, findmypast (http://www.findmypast.com : n.d.); citing p. 13, Piece/Folio 792/124, The National Archives, Kew, Surrey; FHL microfilm 101,774,401.
"England and Wales Census, 1891," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QXKT-J6Z : 2 May 2019), Mary Wheeler in household of John Wheeler, Ewell, Surrey, England, United Kingdom; from "1891 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO RG 12, Surrey county, subdistrict, The National Archives of the UK, Kew, Surrey.
"England and Wales Census, 1911," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XW83-ZHM : 20 December 2018), Mary Wheeler in household of John Wheeler, Epsom, Epsom, Surrey, England; from "1911 England and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO RG 14, The National Archives of the UK, Kew, Surrey.