Seems the fragile Sheila was on a mission against Neville, she probably realised Neville was the main threat?
Nevill, who was wearing his pyjamas, had been shot 8 times. There were 2 wounds to the right side and 2 to the top of the head. If not immediately fatal, the combined effect of these 4 injuries would have been immediate unconsciousness and incapacitation. There was a wound to the left side of the lip and another to the left part of the lower jaw. This injury caused severe fracturing of the jaw, of the teeth in that area and damaged soft tissue in the neck and larynx. These features of this particular injury and the resultant flow of blood into the mouth meant, in the pathologist’s opinion, that Nevill would have been unable to engage in purposeful talk. There were also gunshot wounds to the left shoulder and a grazing wound above the left elbow.
Nevill’s body also had black eyes and a broken nose, linear bruising to the cheeks, lacerations to the head, linear type bruising to the right forearm, bruising to the left wrist and forearm and three circular burn type marks to the back.
She controlled the situation and rifle like a professional, leaving two bullets in the rifle to shoot herself just in case one didn’t finish the job, also realising she had to push the trigger and not pull the trigger while holding the rifle Steady to her throat, even after the first shot she had it all to do again?