Hahaha, Your Excelency 😂 eat that, shithead. She used to call him father, but she now knows he doesn't deserve to be called that.
It's a hard pill to swallow when someone who used to call you by your name, petname, nickname or your relationship to them (like mom, dad...) begins to call you by your surname or position. Going from father to Your Excelency shows the rift between them and that she acknowledges it and is tired of being the only one who is trying in their relationship. For real, go it eat shit, Your Excelency.