Joseph and Laura Wilcott can be found on the 1910 census in Fremont, Clark Co. Wisconsin. The two have been married for about 1 year. This household is only a couple houses down from George and Olive Parker.
Another clue can be found on familysearch.org. On July 24, 1931 Olive Wilcott marries a Russell M. Anspaugh in Superior Montana. Her parents are Joseph Wilcott and Laura Brown. She was born Loyal, Clark, Wisconsin in 1911.
I think that should get you going in the right direction.