She is about to down the mixture but she is spared by the last minute appearance of her father, Tywin who manages to route Stannis and save King’s Landing.
She’s scared but we don’t see this until she is alone in the throne room telling Tommen a story. Earlier in the episode, we see Cersei buying some Nightshade to commit suicide in case of defeat. Cersei won’t be raped and made to bend knee. She tells it like it really is and even admits that she has procured the royal executioner, Ser Ilyn Payne, to kill them if Stannis breaks down the walls.
Cersei spends much of this episode drinking wine and bursting Sansa’s bubble.
