The information that will help you track this Kjeseth family tree would actually be more detailed information about the parents and grandparents.
The 1920 US census lists a Clarence P. Kjeseth family then living in Nelson County, North Dakota. Clarence has a son named Elliott who is listed as 11/12 yr old and born in North Dakota. Clarence is listed as 27 yrs old born in Minnesota, father born Norway and mother born Wisconsin. (Therefore Clarence should have been born about 1892-3 and the middle initial P might be an important clue.)
The 1900 US census lists a Peter O. Kjeseth family living in Polk County, Wisconsin. Peter has a son named Clarence who is listed as born Aug 1892 in Minnesota. On this census it indicates Peter was born Mar 1860 in Norway and his wife was born in Wisconsin. Peter is listed as immigrating in 1881.
IF that Elliott matches information about Sue's parents then these might be a good start for tracking the family tree. Kjeseth is probably the name of the farm in Norway where the family lived or had close family ties.
Minnesota Death Certificate index online lists that state has certificates for both Elliott Monroe Kjeseth and Clarence P. Kjeseth - those would probably be good beginning documents to order and search in detail.
A website of advice on how to track Norwegian ancestors - http://homepages.rootsweb.com/~norway/articles.html