I don’t think the last episode let us really see the depth of her reaction to finding out Viserys meant Aegon the conqueror. Sure, she understands that she fucked up but quickly stands her ground.

In this episode, she’s going through her late husband’s history books and miniatures. We don’t really see what she’s doing, but it’s clear to me that she’s trying to understand what Rhaenyra said to her in the previous episode. She’s trying to understand the impact of what she misunderstood and what “Aegon’s Dream” is.

She’s super insecure and will cling to her mistake but it’s going to make her super unhinged and I’m here for it. Note how much crueler she has gotten towards Aegon. She even went as far as to say “you have no idea the sacrifices that were made to put you on the throne” - alluding to how her and her father put him there. Otto also suggested it to Aegon, and it’s clicking in his head now. She indirectly pushed him to go to battle by belittling him and making him feel like he needed to prove himself.

She’s going to do some really unhinged things once she unravels things a bit more and sees just how wrong she is. And at this point she can’t do anything to stop anything. She helped put a moron on the throne and will spend her days getting her mistakes rubbed in her face.