Pippa Middleton Gun Scandal -- Could Royal Sis Face Arrest? UPDATE (VIDEO)

Pippa Middleton could be facing criminal charges after a passenger in the convertible she was riding in waved a gun at photographers during an outing in Paris.

London's The Sun has an exclusive photo that depicts Middleton, 28, laughing in the passenger seat of an Audi convertible as the driver aims what looks like a pistol back at the photographer. It's still unclear whether the gun is real.

But if the weapon turns out to be just that, Pippa (and all four people in the Audi) could face up to seven years in jail, or up to two years if it's fake, The Sun says. "Good Morning America" reports that the French photographer is still deciding whether to file a formal complaint with the police.

As we previously reported, Pippa was in Paris this weekend to attend a costume party with her friend , fashion label owner Arthur De Soultrait, who was one of the passengers in the car. The driver's identity is still unclear.

Will Pippa be headed for the pokey? We wonder how her sister Kate's reacting to the news today.

Click over to the Sun to see the incriminating photo (!!) and to read more.

UPDATE: Well, turns out the gun was a fake -- phew. A rep for Arthur de Soultrait, who was in the car at the time, told the AP that the driver was "playing a game" using a toy pistol.

Brandishing a fake weapon is still a punishable offense with possibly two years of jail attached. But, as French lawyer Pierre Hourcase told Buzzfeed Shift, "Pippa wont be liable (whether the gun is fake or real) unless she knew or had reason to know that her friend had a gun and intended to use it or otherwise encouraged him to use it." So no pokey for Pippa.

See Pippa's style evolution!