Were the family Hutterites?There is a large Hutterite community in Beiseker, and she may have gone there to join the colony.
I do find this family in the 1906 Canadian Census:
Spring Lake Post Office, Strathcona District,Alberta
Schultz, Carl, head, age ?5, b. Germany, emigrated 1906 Schultz, Caroline, Wife, age ?5, b. Germany Schultz, John, Son, single, age 20, b. Dak., US Schultz, Nellie, Daughter, single, age 12, b. Dak., US