This seems kind of coincidental:

1920 census, Wilmington, DE
Mary Stetter, age 32, born PA, with 3 children 11,8,7 living in household of parents James and Mary Clark. She is listed as married, but no husband in the household.

1940 census, Wilmington, DE:
Mary Stetter, age 50, married crossed out, widowed inserted, b. PA
Harvey STARR, age 27, b. Ohio, son-in-law
Margaret Starr, dtr., age 27, b. DE
Joan Starr, g-dtr., age 4, b. DE
Harvey, Jr., Starr, g-son, age 3, b. DE

Sandra