What you see...

So, I was talking to my mother about the similarities between Domino and Aeryn.

And I hit upon this beautiful, echoing idea.

Sinister needs to kill Dom's mother.

Think about it. Sinny? = Crais.

Therefore, to be perfectly connected.... Sinny shoots Dom's mum. In front of her might work. With Nate dead could also be some nicely added angst.

So, yes. I, am brilliant.