1891 Canadian Census Hay Township, Huron County, Ontario
Carr, William, aged 76, widowed, born Scotland, parents b. same, Presbyterian Carr, Jennet, aged 41, daughter, born Ontario Carr, Jean, aged 38, daughter, born Ontario Carr, Christina, aged 36, daughter, born Ontario Carr, Vina, aged 14, daughter, born Ontario Carr, Charles, aged 9, son, born Ontario
I will guess that Vina and Charles are the children of one of the older girls.
Jennet did have a stillborn illegitimate child in 1877; date not given, but registered in April 1877.
The information about Vina that you mention does not match the info I have provided above.In the 1881 census, Vina is listed as Devinia, aged 3 with Agnes, aged 8. Older adults are Jennet, Christina and Margaret and parents William and Ha????, aged 67 and 65.