Relationship unknown
"She was born Catherine Anne Spears
(she changed her name to Dyer when she married) in Long Beach. Her father, Richard Spears, opened Mercedes-Benz dealerships around the country for 30 years and moved his family frequently; Dyer had attended 17 schools by age 16. Her mother, Martha Wildforster-James, was an executive with KLM Royal Dutch Airlines. And her older sister, Charlotte Ivancic, works as the legal counsel for House Speaker John Boehner, R-Ohio." [emphasis; mine]
Maybe Deborah Dyer is her spouse? Or her spouse's sister?
http://www.csus.edu/sacstatenews/Video/2014/2014-01-24_MadeAtSacState_CateDyer.html