A 26-year-old woman with borderline personality disorder is receiving dialectical behavior therapy (DBT). She calls the PMHNP's after-hours crisis line reporting intense emotional distress after a breakup, stating, 'I feel like I can't stand this pain. I want to cut myself to make it stop.' She denies active suicidal ideation but reports a strong urge to engage in non-suicidal self-injury. The PMHNP asks what DBT skills she has tried. She replies that she has not used any skills yet because she feels too overwhelmed. Which of the following is the most appropriate DBT-informed intervention for this acute crisis?