Ending theory!

Okay this might seem crazy at first but it’s the most logical solution.

We know three gunshots go off in the last scene as bad Jane comes into the room. we know that two of the shots were from bad Jane’s gun as good Jane only has one shot. We know bad John is dead downstairs as he was shot in the eye and we see him lying motionless on the camera so it’s safe to say he’s dead. in the room we have good John sitting on the floor. I believe that good Jane laying down opens the door and with her one shot she shoots bad Jane in the head killing her instantly then good Jane grabs the other gun and shoot John in the head ending his misery then proceeds to shoot herself. Think about it it makes the most sense.