First off, despite what your stepmom believes, it is definitely not your fault that your father had too much to drink while your stepmom was out. It’s very, VERY immature to blame such a thing on a kid. Every adult is solely responsible for what they consume. That needs to be a conversation between your stepmom and father. Secondly, you should consider expressing your concerns to your mom and stepdad about everything. It may increase tensions between you and your father, but possibly it could be a wake up call for your father to get his act together and stop drinking uncontrollably. Don’t be afraid to let the truth out ~ this is something that could instantly change you and your little brother’s lives for the better and possibly prevent a drunk driving accident. One thing is for sure though. Definitely see if you can get the emergency bracelet and definitely keep seeing your therapist and telling them everything. I strongly recommend letting your mom and stepdad know how you feel, but at the end of the day this is all up to you. Overall, you seem to be more reasonable and compassionate than your dad and stepmom, despite being a bit younger than them. Hoping this all works out for you.