I would rather they take her to court and sue her for it rather than bill her for it. Its not physically possible for anyone to open airplane doors in a modern pressurized jet.
She can however legally be sued for a whole host of disruptive events and danger to flight crew, assault, attempted murder of a planeload of passengers regardless of whether she could do it or not, plus al the federalcaviation laws she broke.
The video looks like she had some sort of mental breakdown
...either that or it was the fish.
NEVER eat the fish!
Her not paying bill would trigger a law suit