Born in Campbell, Mo., Dec. 20, 1920, the only daughter of Charles and Eudora Mae Smith Matthews, Jlaine was raised by her Auntie and Uncle Wid. She graduated Campbell High School in 1936 and took her typing and dictation skills and went to live and work in St. Louis. When World War II came, Jlaine went to work for the federal government in Washington, D.C. and for the Army Air Corps in Alaska, as a secretary for the Lend-Lease program, sending bombers to the USSR. Jlaine wintered over twice in Alaska and afterward moved to sunny Los Angeles, working for Carnation Milk.
In 1948, now living in Denver and in the process of converting to Roman Catholicism, Jlaine met a young career Navy man named Urban Costello. In May of 1949 the two were married and started a family. Jlaine had four children in 6 years and she and the kids traveled with Urban to his various duty stations in Seattle, Hayward, and finally Long Beach, Calif., where they bought a house in 1962 and stayed for 41 years.
Jlaine worked for Autonetics and for the City of Long Beach and for the Water Dept. for most of the 60's and 70's, but finished her working life as secretary to the President of the Boilermakers Union in Long Beach.
Jlaine and Urban were active parishioners at St. Joseph's Catholic Church, participating in Guild activities and Boy Scouts. Later Jlaine served as the local chapter President of the Alliance for the Mentally Ill, and volunteered at the Stroke Center.
Jlaine and Urban traveled and visited extensively throughout the USA after their retirement.
Urban passed in 1998, but Jlaine stayed in Long Beach until 2003, until her dementia became serious and she moved to assisted living in Paso Robles, Calif., and eventually to a skilled nursing facility in Atascadero.
She is survived by her four children, Rosemary Miller, of Long Beach, James Costello, of Paso Robles, Christine Ventura and husband Robert, of Kula, Maui, and Joan Costello Waite, of San Diego.
Also surviving are her grandchildren, Heather Ochoa, Andrew and Rebecca Costello, Kristina Rose and Gerald Edward Waite III, and her great-grandchildren, Milan, Tristan, and Angel Ochoa, and Claudia White.
Services were coordinated by the Kuehl-Nicolay Funeral Home in Paso Robles. Funeral Mass celebrated at St. Rose Church in Paso Robles.
Jlaine had best wishes for all her many friends and loved ones and has no doubt gone to heaven.