"It wasn’t about bad customer service, it was about human decency," Devereaux said.

Newser reports it all started when the flight attendant said the girl, Summers, couldn't use the restroom while the plane sat on a tarmac in New York, CBS Boston reports. Summers started crying, but the attendant still said no. "She snapped at me, 'No sit down,'" said Devereaux.

Devereaux got up to clean the mess and refused to comply with the flight attendant's order to sit down. At that point, the plane started moving toward the gate and the pilot announced that a non-compliant passenger was on board who had to be taken to security. Devereaux said she got scared, but an off-duty pilot sitting nearby persuaded the crew that things were OK.

JetBlue offered Devereaux $50 off a future flight and $5,000 to the charity of her choice. "Happy tears," wrote Devereaux on Twitter, "a really nice lady apologized to me!"