I am not related, just trying to assist.Cal Deaths show three entries that might be Katie M. Wilson's children.The third, however, is most promising and perhaps you order the death cert or obit for more info:
Wilson, Charles Edwin b. 07 Mar 1932, mmn Stinnett, male, b. Oklahoma, d. San Francisco County 27 Mar 1992
Wilson, Donald R., b. 11 Jan 1935, mmn Stinnett, male, b. Michigan, d. SF County 12 Jan 1969
Wilson, ISAAC, b. 16 July 1927, mmn Stinnett, male, b. Arkansas, d. SAN BERNARDINO county, 07 Feb 1986.
These records came from Cal Deaths at rootsweb.com.The social security numbers for these three individuals are on the site.