After a few quick look-ups, I found the 1920 Census was 22 Jan. Bettie married Percy Asparagus 24 Aug 1920. The 1920 Census has some siblings for Grace; Margaret 1905, Eugene 1910, Horace 1912, Edith 1913, Hilda 1917, all as Brown. Edith and Hilda are also on the 1930 Census as Asparagus. Additional children born after 1920. This could take some deep study as the older siblings could be Johnson, if that's the correct first husband's name. Therefore, I would say that Grace's LNAB is Brown as this is only 2 years before the Census with Bettie as a widow. Anyway... my 2 cents.
Edit: on Bettie's marriage application for Percy, she states that she had been married only once and that her previous husband died "in Virginia about 7 years ago". Father: Isaac (Edwards?), mother: Harriett.