Maybe a hot take, but one of my favorite smaller throughlines in the show is how I see the evolution of the Martells' marriage. Their big emotional scene at the end of Season 1 marks a change in how they treat each other, and Catherine is more affectionate, kind and even intimate with Pete from then on, even when she is also being a raging bitch; she includes him at every turn. I always thought that change was genuine based on Piper's performance, even if the scripts in Season 2 at times suggest otherwise. I never felt it came off onscreen as Catherine faking (her exasperation with his crying aside). She was both an impossible, difficult person and someone who had come, in her own way, to appreciate Pete a bit more and rediscover some of their love. Piper made me believe in that.