[~Misguided Ghosts~]

I think it's important to be honest, even though it's hard. Maybe you can say, "I know this may be confusing, but I have been doing some thinking and have determined that she/her and my birth name, Madison, are right for me. I'd appreciate it if you started using those." If you're open for questions let them know too, because they may be a little confused. But you're not obligated to answer anything you don't want to.