It was just like The Simpsons. "Ha-ha!"
She let it stop her. When the real punchline would have been to continue, develop the habits that would have lasted her the rest of her life. So that when she was fifty and trim and healthy she could go back to visit that idiot, find him sitting on the couch drinking beer and eating potato chips, so fat he has to struggle to move between the couch and the bathroom. Then it would have been ha-ha.