Christine Meeusen was born into a Catholic family in Milwaukee, Wisconsin. She married, had three children, and settled in Amsterdam, where she worked as a consultant. After she and her husband divorced, she experienced serious financial difficulties and returned to the United States with her children in 2009.[4] Upon arriving in California in 2010, she founded "Caregrowers", a medical cannabis company, with her brother. Also in 2010, Meeusen became involved in the Occupy Movement, donning a Halloween costume nun's habit and becoming known as "Sister Occupy".[5] In 2013 and 2014, Caregrowers closed and she began to adopt the nun persona full-time for her new company, Sisters of the Valley.[6] As of 2025, she continues to use the Sister Kate moniker and dress in the production of cannabis medicine.
She produces the medicine in a semi-cooperative operation in Merced, California, Sisters of the Valley, with her partner Darcy "Sister Darcy" Johnson and other temporary workers.[1] Meeusen, who does not identify with Christianity, considers the production to be a spiritual activity,[7] whose rituals and incorporate New Age practices and environmentalism,[8] "borrowing" from Native American practices.[9]