A 28-year-old woman presents to the psychiatry clinic with a 4-year history of intrusive thoughts about harming her 2-year-old daughter. She reports vivid mental images of the child being injured, which cause intense anxiety and distress. She denies any actual urge or desire to harm the child and performs repetitive checking behaviors (inspecting the child repeatedly, asking family members for reassurance) to neutralize the anxiety. She recognizes these thoughts as irrational and unwanted. On mental status examination, she is alert, oriented, and denies hallucinations or delusions. What is the most appropriate next step in management?