Sorry Sheila may have woken & walked to her final resting place.
The evidence shows the twins would have slept through the opening upstairs shots & kitchen fight if they were not shot first.
She walked there of her own accord?
Anyway, if Jeremy is shooting Nevill four times in the main bedroom as Nevill flees, I have some questions:
At what angle are these shots?
In which direction is Jeremy facing for each shot?