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In her memoir, Remini recalls riding in a car with Cruise's adopted children with ex-wife Nicole Kidman, Isabella and Connor, according to the New York Daily News. During the trip, Remini asked them if they had seen their mother recently.
"Not if I have a choice," Bella answered quickly, according to the book. "Our mom is a f--king SP."
AP
The term has also been used to refer to individuals who doubt the organization and try to get others on their side. Typically, Scientology will order its members to cease all contact with SPs, according to the documentary "Going Clear."
The Church of Scientology didn't immediately respond to Business Insider's request comment.
Cruise and Kidman were married from 1990 to 2001. Isabella and Connor chose to live with Cruise.
Remini left Scientology in 2013. Her memoir was released on Tuesday.