And this is the brilliance of Lena Headey and Cersei. The subtlety is so distinct that her brilliance is passed off as stupidity.
Cersei's one defining strength is her compassion for her children. Her conversation with Catelyn was so good because she was both covering her tracks AND genuinely empathetic. She had lost a kid and knew how it felt. She TRULY felt for Catelyn Stark. You could see it all over her face.
She pulled Joffrey off the wall because she Lancel told her things were going poorly and she knows her son very well. She knew if Stannis won that none of her kids would be allowed to survive. They would get Targaryen'd and she would rather kill them herself because she loves them.
And even through all of that, while she was contemplating all of this, she had the foresight to try and have Tyrion killed,a plan that was in place even before the battle began.
She plays the game so ruthlessly that you think she's blindly enraged. She's not. She knows people are weeds and eventually they either need to be controlled(Pycelle) or pruned(Tyrion).
Uhhh, you do realize that the kid she told Cat about was an abortion right? She didn't want to have any of Robert's babbys
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Game of the decade? More like Guru of the decade mirite?
However, the Guru of the next decade so far is SuperNiceDog