So this should be Mary Ann's parents:
1861
RG9/2329 101 5
Holbeach, Lincolnshire
Washway Rd
William King, head, 26, Ag lab, b. Lincs Moulton
Mary A, wife, 29, b. Holbeach
Betsy, dau, 4, scholar, b. do.
William, son, 5 mo, b. do.
Benjamin Stevens, lodger, mar, 30, Ag lab, b. do.
George Stevens, lodger, 20, Ag lab, b. do.
Joseph Stevens, lodger, 16, Ag lab, b. do.
(The lodgers are in fact Mary A sr's brothers)