Maya did become 'Satan' and Peter knew it.
In the final scene in the car when Maya is holding the gun she looks down at the clock and her eyes and eyelids distort and the eyes "glare", just like she's been possessed... http://abload.de/img/1zdf1h.gif... and right after that the clock turns 666 and Peter gives off this grin as if where excpecting that to happen... http://abload.de/img/23lj7s.gif
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