Article continues below advertisementSister Wives star Christine Brown opened up about developing an oxycodone addiction after a 2016 knee surgery, admitting she was popping pills before filming the show. "I had never taken oxycodone before - if something hurt, I took ibuprofen or aspirin," Brown, 53, writes in her new book, Sister Wife: A Memoir of Faith, Family, and Finding Freedom, which was released on Tuesday, September 2.Article continues below advertisementChristine Brown Turned to Oxycodone After SurgerySource: TLCChristine Brown turned to oxycodone for relief after knee surgery.