Joan Momberg 1940 mother Lillian Fleming

I am trying to locate Joan Momberg the daughter of Lillian and Dutch Momberg, of the Los Angeles area in California.Joan was born in California in the 1940's.I believe that she married in Hawaii in the 1960 and had a son, (name unknown).We share the same great grandmother Susan Dalling Fleming.I would very much like to locate her again. I last shaw her when she came to visit my family in Spokane, Washington with her parents, in the early 1960's.
Charlotte Baker Kennedy of Spokane, Washignton.