That Baptism is a super good find Cas! A great fit for the 1841 Census, which laid out as per the Rules - Benny Sellens widow, 57, who is head of the family, followed by the rest of her Sellens family (Thomas 23 and Henry 13) then after the mark / is Thomas Harder 87 and James Ovenden 45 //
1841 Rules "......Set down one after the other those who have the same surname, beginning with the heads of the family.....At the end of the names of each family draw a line thus / as in the Example. At the end of the names of the inmates in each house draw a double line thus //.
I note the Census - the enumerator didn't apply the "age round down" rule, which is a bonus, and Benny is stated as Widow (crossed out as it wasn't an occupation, but still, it's there )
So in 1841, it does very much look like her Father is in her household, as Cas says. Obtaining his death cert - very possibly Benney is the informant and it may state her relationship to the deceased..
Was your Benney ever documented as "Benedicta"?
Cheers
AMBLY