I'm gonna attack my brother because he told this woman our parents were away.
Why would you start a fight with your brother over this?
I'm pretty hurt by his actions. Why would he tell her that?
It can be upsetting when a family member does something without consulting you, but you shouldn't start a fight with them over it.  This might just anger your brother further and he might continue to do things to get back at you out of spite.
I'm going to beat the shit out of him for it.
Listen, he did something you dislike, but that does not call for violence. Relax and talk it through.