A woman who met Colorado killer Chris Watts on Tinder is opening up about her short-lived affair with him. Amanda McMahon met Watts, who pleaded guilty last month to killing his pregnant wife, Shan'ann, and two daughters, on the dating site last March, just five months before he committed the murders. "He seemed like a genuine guy," McMahon told Inside Edition. "He was funny. He was charming." She added that Watts told her he was divorced.