Dysfunctional family advice - what do you do when the other adults in your life act like children?

wow girl, you got your hands full..but i know how you feel.my mom and brother use to do the same thing but not to that extreme.the best thing that you can do is just simply tell them that your not taking sides.you will give advice but your staying neutral..no matter what..you need to put your foot down and stand your ground...i know its easier said than done but you'll be glad you did it in the end..i feel for ya..good luck..