or if they were aware Hm, maybe they were too scared too move or say anything.
but with one twin still having his thumb in his mouth i think its unlikely.
I see no way those kids slept through the masacre as described.
Now if a silencer was involved... but then that becomes a bit more inconvenient 
Bob, are you aware how little noise a .22 makes, with, or without a silencer.
it does not make a noise like a twelve bore, in fact a .22 is reletivly quiet.
Not really Cliff, but if they're that quiet why do people use silencers on them?
Okay Bob, I understand that a lot of folk do not know how much noise these guns make.
A silencer is normally fitted, so when you have a shot at a rabbit for instance it will not spook the other rabbits around it.
I have been out with my son, and he has shot a rabbit, and the others just sit there, as they did not hear the shot.
Different things can also come into play, for instance the wind direction.
There are many variables
Thanks for clarifying that Cliff.
But even with the gun not making much noise I still think the human noise of people being shot, running up and down the stairs, presumably shouting at each other, and the fight in the kitchen would have woken the kids.
The question of whether or not Sheila's two boys might have slept through a commotion or have been woken by one is a difficult issue.
On the one hand, as Sheila's friend, Freddie, testified, the poor little mites had seen and heard their mother ranting and raving about the devil and punching walls and herself during her psychotic episodes. Freddie stated that he was afraid for the safety of everyone in the flat during one episode, so how much more afraid must those the twins have been at times? There were also violent rows at times, for example, when Sheila punched her hand through a plate glass window. So the twins may have been so used to rows and commotion that they slept through these,
On the other hand, those disturbing pictures that the boys produced suggests to me that these little lads may have been quite disturbed themselves by the chaotic situation that surrounded them. Were the boys aware that Sheila believed that they were possessed by the devil? Sheila was so clearly out of control at times that it would not surprise me if the boys were aware of her delusions about demonic possession. I would also not be surprised if the twins suffered from nightmares and had problems sleeping. Of course, they may have been so exhausted by their day running around on the farm that they slept very soundly that night and knew nothing of what happened. I hope so.