Apparently they had a fourth child, a daughter Amy Jeanine Tonack...as she claims William and Judy as her brother/sister.
The family visited Judy wanting information about their mother Amy Jeanine, she promised to provide it, but then stood them up....(must have been some skeletons no one wants to deal with.)
Amy Jeanine Tonack married in 1949 to Theodore Edwin Johnson (who just died 8 May 2008) They divorced or separated 1951 or so. She died 15 Oct 1991 in Seattle, King County, Washington, but was buried in Hoquiam, Grays Harbor County, Washington.
Will have to wait until the 1940 census, to see if she turns up living with Amy Sloan Tonack...(and her newest husband.)