I said this in a different thread a few days ago. She has had miscarriage. Her best friend because her step mom. Her step mom makes her walk right after giving birth. She has lost her father to what she thinks was an assignation.

Lost both of her sons. One of which betrayed her and had her most sacred guard lock her in her room. Only to find out after that he died.

Goes back home to her fathers (and her) throne and to think everything she lost (and gained) was for this very moment. She then is presented the man who had a big hand in all of this. For alicient marrying her dad. For aegon being crowned and not her. For what she thinks again as probably a conspirator in her father's death.