Hi James, I found a Christene Houston on the social Security Death Index and the dates matched yours.
I found her death cert in FamilySearch but no husband or parents listed.
I couldn't find her anywhere on the U.S. Censuses in ancestry.com or HeritageQuest.
I suggest you request her obituary from the Midland newspaper or post another query on www.rootsweb.com, Texas Midland County Message Board or their Houston Surname Message Board. Successful Searching!