In one of Jonwen's links for Frances in the poorhouse it said Frances was a cook.
This should be her in the 1921 then:
84 Ashley Garden S.W.1
Somewhere in the Parish of St George's Hanover Square, St Margaret and St. John
Frances Morley, cook, 38 yrs 7 months, widow, born Brixton, London.
Household members
Thomas Henry Webb, age 32, married, born Yorkshire, a contractor, with his 26 yo wife Lillah, born Scotland, and daughter Lillah Victoria, age 4 1/2, born Yorkshire.
Also a nurse, Constance Morris, with no details, but a note saying " left before age and place of birth could be obtained.
I am enclosing the clip of Frances, as the entire census appears to have been rewritten in a darker pen, and I can't tell if under the dark "widow" for Frances, does it say "single"?
Also including her signature in the hopes it can be compared to the signature on the marriage to Percy Painter.
She was supposed to fill out the column for the ages of children of widowed people, but left hers blank.
Sadly, none of her children are with her, but the 1921 is a bit odd in that respect. Servants that are at the address on a daily basis could be included, providing they aren't counted elsewhere, such as Frances was, but it does not mean she actually lived there. Will post the column headers if anyone is confused by that!
Edited slightly for clarity.
