Potential 1841 census for them, almost next to eachother?
Grace:
can't read place name
John Thomas, 65, farmer, not born county
Grace do, 25, born county
Margaret do, 15, born county
Margaret Edmund, 25, FS, born county
William Jones, 20, MS, born county
Again struggling to read address for Hugh, but its on the same document.
Separate dwelling house:
Hugh Williams, 19, MS, born county
Owen Williams, 16, MS, born county
Mary Roberts, 20, FS, born county
Piece 1363
Book 12
Folio 11
Page number 16
Not sure about this, there are a few things that don't fit, like Grace's father being a farmer rather than a Labourer that she said he was on the marriage record in 1842, but it caught my eye because there is a Grace and Hugh fairly close together, with Grace older.