My stepmom wants to cut me and my brother out of the "new family". What should I do?

Omigod I know excactly how you feel! You could like be me! But anyway how I delt with this was by (when the stepmonster isn't around) tell your dad that you and your brother just...don't like her. And if he doesn't seem to understand or if he sticks up for her, than you should really threaten to stop coming over if he is going to let her treat you like that. It worked for me. And if he asks if you mean you want them to get divorced then say, "Yes, that's excactly what I mean."