I would say that the blood spatter on her right thigh and the large spatter on the back wall came from the initial discharge. The second and third shots came when she was likely laying down. As the larger blood spatter appears to originate lower and are bigger streaks than the initial spatter thus insinuating that the bullet struck blood concentrated either in her sinus cavities or on the surface. She likely did not suffer after the first shot. She was either unconscious or already deceased.