Morag sagged a little in relief as Antonin sent the elves to handle the fire that had started. She was pretty sure that even Percy wouldn't let burning down Hogsmeade slide. And Umbridge would go up in flames!
Unaccountably, she giggled. Once she started, she couldn't stop.
Antonin was left to help (i.e. maneuver) her up on deck and into a seat. By the time she managed to stop laughing, her eyes were watering and she was shaky.
But it seemed to have done something to her stress levels, and she wasn't feeling as much like she was about to lose control. She took the drink she was handed and sipped it slowly.