The third point of view:
Reina knew as soon as her kids left that she couldn't wait around for her death. If she was going to die, she had to bring down at least one of her enemies with her - that was the Sakuzi clan style of dying honorably anyway.
That was why she manipulated the darkness and the little time she had left to make her way back into the bedroom. If she was going to fight her last battle all alone while hoping to bring down one of them - Miguel thankfully- Reina had to be equipped and prepared.
She was still in the middle of opening Niklaus' secret armory - located inside their wardrobe - designed for emergencies like this when the light came alive. God, they were here.
With a deep breath, Reina reached out and grabbed the pistol, grabbed a fair amount of ammunition, and cocked the gun.