She was prepared for Tommen's death because of the Maggie the Witch's prophecy - Joffrey and Mycella already dead so at that point had probably already accepted he was doneNah I don't think she planned it. But her kids were the only thing keep her "human" now she is wilding.

)

"hey she can't do that!"
I kinda wish they showed arya killing frey's sons. Its a little hard to believe she would get the drop on all of them, unless she just poisned them

