Together

At an office Christmas part Shelley calls Tony and tells him he must get a divorce and marry her. She threatens to tell his wife about her if he doesn’t. After the party, Tony comes to Shelley’s office. When she threatens him again, he stabs her. He tries to leave the office but discovers that the door is locked. He finds the keys but uses the wrong one and jams the door. He tries other ways, but they all fail. How will he get out?