A 46-year-old Lake Mathews man who sexually abused three girls, at least one of whom was in the Riverside County foster care system, was bound for state prison Wednesday to serve a nine-year term, while his wife was on probation for aiding him in trying to cover up the crimes.

Christopher Gary Tilden pleaded guilty in March to four counts of lewd acts on a minor, felony annoying a child and felony indecent exposure. Tilden’s plea was directed to Superior Court Judge Gary Polk, without negotiations between the prosecution and defense. No charges were dismissed.

Soon afterward, Tilden’s spouse, 44-year-old Katrina Frances Tilden, admitted a misdemeanor charge of being an accessory after the fact. Her admission stemmed from a pretrial agreement with the Riverside County District Attorney’s

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