I can't easily spot Mary in 1841 but I'm hoping these are her brothers and father in 1851 ...
1851
HO107/1669 806 5
All Saints Southampton
Maurice Marlow, head, 33, Tailor, b. Hants Fordingbridge
Ann, wife, 38, b. Hants Bremer
John A, son, 4, b. Southampton
Martha, dau, 2, b. do.
Elizabeth, dau, 6 mo, b. Bremer
William, father, wid, 67, Pauper (Tailor), b. Fordingbridge
Henry, brother, 14, Errand Boy, b. do.