In case it's any help this may be her in earlier census
1851
Compton, Marldon, Devon
William and Jane Ottaway, Farmer and their family
Servants including Henry Stoneman, George Damrell, and
Elizabeth Winser Servant Un 18 House Servant (Farm) Devon Marldon
HO107; Piece: 1873; Folio: 10; Page: 13
I wonder if there's any way she could have been married previous to marrying Thomas.
1841 Marldon Village, Devon
All born in County
John Winsor 40
Agness 40
Ellen 13
Mary Ann 11
Elizabeth 9
Thomas 7
Jane 5
George 2
Elias 1 month
Class: HO107; Piece 228; Book: 8; Folio: 5; Page: 4
I notice that Thomas and Elizabeth named their second known son Elias also