Full names to help if any others help with the search.
PETTREY James Henry 25 years Status Single Father James Henry PETTREY
GAGHEN Eva Beatrice Annie 19 years Status Single Father Philip Laurence GAGHEN
31 Aug 1911
At the Residence of Rev M L Murphy, Alberton PtA 248/572
It would appear they only had two sons.
PETTREY Glenmore James
25 Jul 1912
Father James Henry PETTREY Mother Eva Beatrice GAGHEN
At Semaphore PtA 892/160
PETTREY Jack Henry
26 Sep 1915
Father James Henry PETTREY Mother Eva Beatrice GAGHEN
At Semaphore PtA967/305
Eva died in 1983 and buried with her parents at Cheltenham Cemetery
http://www.aca.sa.gov.au/RecordsDied on 2 Oct 1983 at 91 Years of age. Previously lived in Heathfield SA.
Her husband is also buried at Cheltenham but he is not interred in the same grave.
http://nla.gov.au/nla.news-article96122788 1937
ENGAGEMENT
OLSON—PETTREY.—The engagement is announced of Amy, eldest daughter of Mr. and Mrs. C. Olson, of Whyalla, to Glenmore, eldest son of Mi-, and Mrs. J. Pettrey, of Largs Bay.
http://nla.gov.au/nla.news-article96281642 1938
APPROACHING MARRIAGE
OLSON—PETTREY—The marriage of Amy eldest daughter of Mr. and Mrs. G. Olson Whyalla, to Glenmore, elder son of Mr. and Mrs. J. Pettrey, Largs Bay will be solemnised at Central Methodist Church, Port Pirie, on Saturday. August 6, at 7 p.m. Rev. V. E. Vogt officiating.
Reception at Palais.
Jack Henry died in 1979 and Glenmore James in 1987.
Jack was cremated at Centennial Park and ashes removed.
http://www.centennialpark.org/memorial-search/jack-henry-pettrey-143519/Glenmore was interred at Scotts Creek Cemetery.
http://www.australiancemeteries.com.au/sa/adelaide_hills/scottscreekhs_images/pettrey_glenmore_james__132.jpgCando
Edit - poor signal earlier tonight and the site wouldn't load but now you may as well have what I found.